Harmonization summary
1,085 label-stable codes
- Label changes detected
- 78
- Multiple dataset contexts
- 34
- Unique codes
- 1,184
- Enriched codes in this report
- 1
Praxis Data Lab · Variable History
Variable history and harmonization report.
Review variable definitions, cycle chronology, survey design, laboratory methods, method-change boundaries, detection limits, and evidence-backed harmonization actions.
1,184matching variable codes
7,529 release records across 115 datasets and 12 cycles.
Search scope
Filtered NHANES variable history
Component: Dietary.
Scientific safeguard
Qualified assessment is authoritative; chronology remains supporting evidence.
Praxis separates source-stated method or instrument changes from automated differences in CDC/NCHS method text. The qualified harmonization assessment below is the researcher-facing conclusion; method chronology explains the underlying evidence and does not override that adjudication.
Variable-by-variable chronology
Qualified harmonization assessment and indexed evidence
Each variable first shows the current qualified assessment used by Study Builder, followed by cycle-specific source evidence and method chronology.
DBD100Compatible with harmonization
How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . .
- Observed years
- 2001–2023
- Release records
- 11
- Datasets
- 11
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2001-2002 → 2003-2004 · 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
Variable names / labels over time
- How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — 2001-2002 · 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016
- How often {do you/does SP} add this salt to {your/his/her/SP's} food at the table? Would you say . . . — 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2001-2002: DRXTOT_B — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes (Dietary)
- 2003-2004: DR1TOT_C — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — How often {do you/does SP} add this salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — How often {do you/does SP} add this salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — How often {do you/does SP} add this salt to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DBQ095Compatible with harmonization
What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . .
- Observed years
- 2001–2002
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 1999-2000 → 2001-2002
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — 2001-2002
Cycle-by-cycle release history
- 2001-2002: DRXTOT_B — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes (Dietary)
DBQ095ZCompatible with harmonization
What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . .
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . . — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1_020Compatible with harmonization
What time did you begin to eat/drink the meal/food?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- What time did you begin to eat/drink the meal/food? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
DR1_030ZCompatible with harmonization
Name of eating occasion
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Name of eating occasion — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
DR1_040ZCompatible with harmonization
Was this food eaten at home?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Was this food eaten at home? — 2003-2004
- Did you eat this meal at home? — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Was this food eaten at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
DR1_300Compatible with harmonization
Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1_320Evidence developing
Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified Praxis harmonization assessment
Evidence developing · low confidence
No normalized longitudinal change evidence is available for this variable. Absence of events must not be interpreted as proof of cross-cycle equivalence.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Variable names / labels over time
- Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1_320ZCompatible with harmonization
Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR1TOT_D — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1_330Evidence developing
Total tap water drank yesterday - including filtered tap water and water from a drinking fountain.
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified Praxis harmonization assessment
Evidence developing · low confidence
No normalized longitudinal change evidence is available for this variable. Absence of events must not be interpreted as proof of cross-cycle equivalence.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Variable names / labels over time
- Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1_330ZCompatible with harmonization
Total tap water drank yesterday - including filtered tap water and water from a drinking fountain.
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR1TOT_D — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1BWATREvidence developing
Total bottled water drank yesterday. (gm)
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified Praxis harmonization assessment
Evidence developing · low confidence
No normalized longitudinal change evidence is available for this variable. Absence of events must not be interpreted as proof of cross-cycle equivalence.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Variable names / labels over time
- Total bottled water drank yesterday. (gm) — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1BWATZCompatible with harmonization
Total bottled water drank yesterday (gm)
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Total bottled water drank yesterday (gm) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR1TOT_D — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1CCMNMCompatible with harmonization
Combination food number
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Combination food number — 2003-2004
- Combination food number (sequential number) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Combination food number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1CCMTXCompatible with harmonization
Combination food type
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Combination food type — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
DR1CWATREvidence developing
Plain carbonated water drank yesterday - including unsweetened carbonated water, seltzer water, club soda, and carbonated bottled water such as Perrier.
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified Praxis harmonization assessment
Evidence developing · low confidence
No normalized longitudinal change evidence is available for this variable. Absence of events must not be interpreted as proof of cross-cycle equivalence.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Variable names / labels over time
- Plain carbonated water drank yesterday - including unsweetened carbonated water, seltzer water, club soda, and carbonated bottled water such as Perrier. — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Plain carbonated water drank yesterday - including unsweetened carbonated water, seltzer water, club soda, and carbonated bottled water such as Perrier. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1DAYCompatible with harmonization
Intake day of the week
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
- Source evidence 1
- Source evidence 2
- Source evidence 3
- Source evidence 4
- Source evidence 5
- Source evidence 6
- Source evidence 7
- Source evidence 8
- Source evidence 9
- Source evidence 10
- Source evidence 11
- Source evidence 12
- Source evidence 13
- Source evidence 14
- Source evidence 15
- Source evidence 16
- Source evidence 17
- Source evidence 18
- Source evidence 19
- Source evidence 20
- Source evidence 21
- Source evidence 22
- Source evidence 23
- Source evidence 24
- Source evidence 25
- Source evidence 26
- Source evidence 27
- Source evidence 28
- Source evidence 29
- Source evidence 30
Variable names / labels over time
- Intake day of the week — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2003-2004: DR1TOT_C — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1IFF_D — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1TOT_D — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1IFF_E — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1TOT_E — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1IDS_E — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2007-2008: DS1TOT_E — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1IFF_F — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1TOT_F — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1IDS_F — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2009-2010: DS1TOT_F — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1IFF_G — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1TOT_G — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1IDS_G — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2011-2012: DS1TOT_G — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1IFF_H — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1TOT_H — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1IDS_H — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2013-2014: DS1TOT_H — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2015-2016: DR1IFF_I — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1TOT_I — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1IDS_I — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2015-2016: DS1TOT_I — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1IFF_J — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1TOT_J — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1IDS_J — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2018: DS1TOT_J — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1IFF — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1TOT — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1IDS — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DS1TOT — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1IFF_L — Intake day of the week — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1TOT_L — Intake day of the week — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1DBIHCompatible with harmonization
Number of days between intake day and the day of family questionnaire administered in the household.
- Observed years
- 2007–2023
- Release records
- 28
- Datasets
- 28
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
- Source evidence 1
- Source evidence 2
- Source evidence 3
- Source evidence 4
- Source evidence 5
- Source evidence 6
- Source evidence 7
- Source evidence 8
- Source evidence 9
- Source evidence 10
- Source evidence 11
- Source evidence 12
- Source evidence 13
- Source evidence 14
- Source evidence 15
- Source evidence 16
- Source evidence 17
- Source evidence 18
- Source evidence 19
- Source evidence 20
- Source evidence 21
- Source evidence 22
- Source evidence 23
- Source evidence 24
Variable names / labels over time
- Number of days between intake day and the day of family questionnaire administered in the household. — 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
- # of days b/w intake and HH interview — 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020
Cycle-by-cycle release history
- 2007-2008: DR1IFF_E — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1TOT_E — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1IFF_F — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1TOT_F — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1IDS_F — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2009-2010: DS1TOT_F — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1IFF_G — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1TOT_G — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1IDS_G — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2011-2012: DS1TOT_G — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1IFF_H — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1TOT_H — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1IDS_H — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2013-2014: DS1TOT_H — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2015-2016: DR1IFF_I — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1TOT_I — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1IDS_I — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2015-2016: DS1TOT_I — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1IFF_J — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1TOT_J — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1IDS_J — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2018: DS1TOT_J — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1IFF — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1TOT — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1IDS — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DS1TOT — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1IFF_L — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1TOT_L — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1DRSTZCompatible with harmonization
Dietary recall status
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
- Source evidence 1
- Source evidence 2
- Source evidence 3
- Source evidence 4
- Source evidence 5
- Source evidence 6
- Source evidence 7
- Source evidence 8
- Source evidence 9
- Source evidence 10
- Source evidence 11
- Source evidence 12
- Source evidence 13
- Source evidence 14
- Source evidence 15
- Source evidence 16
- Source evidence 17
- Source evidence 18
- Source evidence 19
- Source evidence 20
- Source evidence 21
- Source evidence 22
- Source evidence 23
- Source evidence 24
- Source evidence 25
- Source evidence 26
- Source evidence 27
- Source evidence 28
- Source evidence 29
- Source evidence 30
Variable names / labels over time
- Dietary recall status — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2003-2004: DR1TOT_C — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1IFF_D — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1TOT_D — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1IFF_E — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1TOT_E — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1IDS_E — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2007-2008: DS1TOT_E — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1IFF_F — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1TOT_F — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1IDS_F — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2009-2010: DS1TOT_F — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1IFF_G — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1TOT_G — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1IDS_G — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2011-2012: DS1TOT_G — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1IFF_H — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1TOT_H — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1IDS_H — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2013-2014: DS1TOT_H — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2015-2016: DR1IFF_I — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1TOT_I — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1IDS_I — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2015-2016: DS1TOT_I — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1IFF_J — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1TOT_J — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1IDS_J — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2018: DS1TOT_J — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1IFF — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1TOT — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1IDS — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DS1TOT — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1IFF_L — Dietary recall status — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1TOT_L — Dietary recall status — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1EXMERCompatible with harmonization
Interviewer ID code
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
- Source evidence 1
- Source evidence 2
- Source evidence 3
- Source evidence 4
- Source evidence 5
- Source evidence 6
- Source evidence 7
- Source evidence 8
- Source evidence 9
- Source evidence 10
- Source evidence 11
- Source evidence 12
- Source evidence 13
- Source evidence 14
- Source evidence 15
- Source evidence 16
- Source evidence 17
- Source evidence 18
- Source evidence 19
- Source evidence 20
- Source evidence 21
- Source evidence 22
- Source evidence 23
- Source evidence 24
- Source evidence 25
- Source evidence 26
- Source evidence 27
- Source evidence 28
- Source evidence 29
- Source evidence 30
Variable names / labels over time
- Interviewer ID code — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
- — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — — Dietary Interview - Individual Foods, First Day (Dietary)
- 2003-2004: DR1TOT_C — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1IFF_D — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1TOT_D — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1IFF_E — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1TOT_E — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1IDS_E — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2007-2008: DS1TOT_E — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1IFF_F — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1TOT_F — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1IDS_F — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2009-2010: DS1TOT_F — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1IFF_G — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1TOT_G — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1IDS_G — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2011-2012: DS1TOT_G — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1IFF_H — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1TOT_H — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1IDS_H — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2013-2014: DS1TOT_H — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2015-2016: DR1IFF_I — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1TOT_I — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1IDS_I — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2015-2016: DS1TOT_I — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1IFF_J — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1TOT_J — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1IDS_J — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2018: DS1TOT_J — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1IFF — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1TOT — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1IDS — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DS1TOT — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1IFF_L — Interviewer ID code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1TOT_L — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1FSCompatible with harmonization
Where did you get (this/most of the ingredients for this) {FOODNAME}?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Where did you get (this/most of the ingredients for this) {FOODNAME}? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
DR1HELPCompatible with harmonization
Who helped in responding for this interview
- Observed years
- 2015–2023
- Release records
- 7
- Datasets
- 7
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Who helped in responding for this interview — 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2015-2016: DR1TOT_I — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1TOT_I — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1TOT_J — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1TOT_J — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1TOT — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1TOT — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1TOT_L — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1HELPDCompatible with harmonization
Who helped in responding for this interview
- Observed years
- 2003–2014
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Who helped in responding for this interview — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1TOT_E — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1TOT_F — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1TOT_F — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1TOT_G — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1TOT_G — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1TOT_H — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1TOT_H — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
DR1IACARCompatible with harmonization
Alpha-carotene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Alpha-carotene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IALCOCompatible with harmonization
Alcohol (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Alcohol (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IATOACompatible with harmonization
Added alpha-tocopherol (Vitamin E) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Added alpha-tocopherol (Vitamin E) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IATOCCompatible with harmonization
Vitamin E as alpha-tocopherol (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin E as alpha-tocopherol (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IB12ACompatible with harmonization
Added vitamin B12 (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Added vitamin B12 (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IBCARCompatible with harmonization
Beta-carotene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Beta-carotene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICAFFCompatible with harmonization
Caffeine (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Caffeine (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICALCCompatible with harmonization
Calcium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Calcium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICARBCompatible with harmonization
Carbohydrate (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Carbohydrate (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICHLCompatible with harmonization
Total choline (mg)
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Total choline (mg) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR1IFF_D — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICHOLCompatible with harmonization
Cholesterol (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Cholesterol (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICOPPCompatible with harmonization
Copper (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Copper (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICRYPCompatible with harmonization
Beta-cryptoxanthin (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Beta-cryptoxanthin (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFACompatible with harmonization
Folic acid (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Folic acid (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFDCDCompatible with harmonization
USDA food code
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- USDA food code — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFDFECompatible with harmonization
Folate as dietary folate equivalents (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Folate as dietary folate equivalents (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFFCompatible with harmonization
Food folate (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Food folate (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFIBECompatible with harmonization
Dietary fiber (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Dietary fiber (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFOLACompatible with harmonization
Total Folate (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Total Folate (mcg) — 2003-2004
- Total folate (mcg) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Total Folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IGRMSCompatible with harmonization
Gram weight of the food/individual component
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Gram weight of the food/individual component — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IIRONCompatible with harmonization
Iron (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Iron (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IKCALCompatible with harmonization
Energy (kcal)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Energy (kcal) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ILINECompatible with harmonization
Food/individual component number
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Food/individual component number — 2003-2004
- Food/Individual component number — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Food/individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ILYCOCompatible with harmonization
Lycopene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Lycopene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ILZCompatible with harmonization
Lutein + zeaxanthin (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Lutein + zeaxanthin (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM161Compatible with harmonization
MFA 16:1 (Hexadecenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- MFA 16:1 (Hexadecenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM181Compatible with harmonization
MFA 18:1 (Octadecenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- MFA 18:1 (Octadecenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM201Compatible with harmonization
MFA 20:1 (Eicosenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- MFA 20:1 (Eicosenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM221Compatible with harmonization
MFA 22:1 (Docosenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- MFA 22:1 (Docosenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IMAGNCompatible with harmonization
Magnesium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Magnesium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IMFATCompatible with harmonization
Total monounsaturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Total monounsaturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IMOISCompatible with harmonization
Moisture (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Moisture (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1INIACCompatible with harmonization
Niacin (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Niacin (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP182Compatible with harmonization
PFA 18:2 (Octadecadienoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 18:2 (Octadecadienoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP183Compatible with harmonization
PFA 18:3 (Octadecatrienoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 18:3 (Octadecatrienoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP184Compatible with harmonization
PFA 18:4 (Octadecatetraenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 18:4 (Octadecatetraenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP204Compatible with harmonization
PFA 20:4 (Eicosatetraenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 20:4 (Eicosatetraenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP205Compatible with harmonization
PFA 20:5 (Eicosapentaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 20:5 (Eicosapentaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP225Compatible with harmonization
PFA 22:5 (Docosapentaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 22:5 (Docosapentaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP226Compatible with harmonization
PFA 22:6 (Docosahexaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- PFA 22:6 (Docosahexaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPFATCompatible with harmonization
Total polyunsaturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Total polyunsaturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPHOSCompatible with harmonization
Phosphorus (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Phosphorus (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPOTACompatible with harmonization
Potassium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Potassium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPROTCompatible with harmonization
Protein (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Protein (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IRETCompatible with harmonization
Retinol (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Retinol (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS040Compatible with harmonization
SFA 4:0 (Butanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 4:0 (Butanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS060Compatible with harmonization
SFA 6:0 (Hexanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 6:0 (Hexanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS080Compatible with harmonization
SFA 8:0 (Octanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 8:0 (Octanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS100Compatible with harmonization
SFA 10:0 (Decanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 10:0 (Decanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS120Compatible with harmonization
SFA 12:0 (Dodecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 12:0 (Dodecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS140Compatible with harmonization
SFA 14:0 (Tetradecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 14:0 (Tetradecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS160Compatible with harmonization
SFA 16:0 (Hexadecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 16:0 (Hexadecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS180Compatible with harmonization
SFA 18:0 (Octadecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- SFA 18:0 (Octadecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ISELECompatible with harmonization
Selenium (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Selenium (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Selenium (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ISFATCompatible with harmonization
Total saturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Total saturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ISODICompatible with harmonization
Sodium (mg)(adjusted for salt use in food preparation)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Sodium (mg)(adjusted for salt use in food preparation) — 2003-2004 · 2005-2006 · 2007-2008
- Sodium (mg) — 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Sodium (mg)(adjusted for salt use in food preparation) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Sodium (mg)(adjusted for salt use in food preparation) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Sodium (mg)(adjusted for salt use in food preparation) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Sodium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ISUGRCompatible with harmonization
Total sugars (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Total sugars (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total sugars (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ITFATCompatible with harmonization
Total fat (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Total fat (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Total fat (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ITHEOCompatible with harmonization
Theobromine (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Theobromine (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Theobromine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVARACompatible with harmonization
Vitamin A as retinol activity equivalents (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin A as retinol activity equivalents (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVB1Compatible with harmonization
Thiamin (Vitamin B1) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Thiamin (Vitamin B1) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVB12Compatible with harmonization
Vitamin B12 (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin B12 (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVB2Compatible with harmonization
Riboflavin (Vitamin B2) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Riboflavin (Vitamin B2) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVB6Compatible with harmonization
Vitamin B6 (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin B6 (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin B6 (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVCCompatible with harmonization
Vitamin C (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin C (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin C (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVDCompatible with harmonization
Vitamin D (D2 + D3) (mcg)
- Observed years
- 2007–2023
- Release records
- 8
- Datasets
- 8
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Vitamin D (D2 + D3) (mcg) — 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2007-2008: DR1IFF_E — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IVKCompatible with harmonization
Vitamin K (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin K (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Vitamin K (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IZINCCompatible with harmonization
Zinc (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Zinc (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1IFF_H — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1IFF_I — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1IFF_J — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1IFF — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1IFF_L — Zinc (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1LANGCompatible with harmonization
The SP/Proxy spoke mostly:
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Confirm that the construct and coding are unchanged before pooling or recoding.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
- Source evidence 1
- Source evidence 2
- Source evidence 3
- Source evidence 4
- Source evidence 5
- Source evidence 6
- Source evidence 7
- Source evidence 8
- Source evidence 9
- Source evidence 10
- Source evidence 11
- Source evidence 12
- Source evidence 13
- Source evidence 14
- Source evidence 15
- Source evidence 16
- Source evidence 17
- Source evidence 18
- Source evidence 19
- Source evidence 20
- Source evidence 21
- Source evidence 22
- Source evidence 23
- Source evidence 24
- Source evidence 25
- Source evidence 26
- Source evidence 27
- Source evidence 28
- Source evidence 29
- Source evidence 30
Variable names / labels over time
- The SP/Proxy spoke mostly: — 2003-2004
- The respondent spoke mostly: — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — The SP/Proxy spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2003-2004: DR1TOT_C — The SP/Proxy spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1IFF_D — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1TOT_D — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1IFF_E — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1TOT_E — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1IDS_E — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2007-2008: DS1TOT_E — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1IFF_F — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1TOT_F — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1IDS_F — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2009-2010: DS1TOT_F — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1IFF_G — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1TOT_G — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1IDS_G — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2011-2012: DS1TOT_G — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1IFF_H — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2013-2014: DR1TOT_H — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1IDS_H — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2013-2014: DS1TOT_H — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2015-2016: DR1IFF_I — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2015-2016: DR1TOT_I — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1IDS_I — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2015-2016: DS1TOT_I — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1IFF_J — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2018: DR1TOT_J — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1IDS_J — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2018: DS1TOT_J — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1IFF — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2017-2020: P_DR1TOT — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1IDS — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DS1TOT — The respondent spoke mostly: — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1IFF_L — The respondent spoke mostly: — Dietary Interview - Individual Foods, First Day (Dietary)
- 2021-2023: DR1TOT_L — The respondent spoke mostly: — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1MCCompatible with harmonization
Modification code
- Observed years
- 2003–2012
- Release records
- 5
- Datasets
- 5
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Modification code — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012
Cycle-by-cycle release history
- 2003-2004: DR1IFF_C — Modification code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2005-2006: DR1IFF_D — Modification code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2007-2008: DR1IFF_E — Modification code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2009-2010: DR1IFF_F — Modification code — Dietary Interview - Individual Foods, First Day (Dietary)
- 2011-2012: DR1IFF_G — Modification code — Dietary Interview - Individual Foods, First Day (Dietary)
DR1MNRSPCompatible with harmonization
Who was the main respondent for this interview?
- Observed years
- 2003–2014
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Who was the main respondent for this interview? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1TOT_E — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1TOT_F — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1TOT_F — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1TOT_G — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1TOT_G — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1TOT_H — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1TOT_H — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
DR1MRESPCompatible with harmonization
Who was the main respondent for this interview?
- Observed years
- 2015–2023
- Release records
- 7
- Datasets
- 7
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Who was the main respondent for this interview? — 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2015-2016: DR1TOT_I — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1TOT_I — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1TOT_J — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1TOT_J — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1TOT — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1TOT — Who was the main respondent for this interview? — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1TOT_L — Who was the main respondent for this interview? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1SKYCompatible with harmonization
What type of salt was it? (Was it ordinary or seasoned salt, lite salt, or a salt substitute?)
- Observed years
- 2013–2023
- Release records
- 5
- Datasets
- 5
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of salt was it? (Was it ordinary or seasoned salt, lite salt, or a salt substitute?) — 2013-2014 · 2015-2016
- What type of salt was it? (Was it ordinary or sea salt, lite salt, or a salt substitute?) — 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2013-2014: DR1TOT_H — What type of salt was it? (Was it ordinary or seasoned salt, lite salt, or a salt substitute?) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — What type of salt was it? (Was it ordinary or seasoned salt, lite salt, or a salt substitute?) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — What type of salt was it? (Was it ordinary or sea salt, lite salt, or a salt substitute?) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — What type of salt was it? (Was it ordinary or sea salt, lite salt, or a salt substitute?) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — What type of salt was it? (Was it ordinary or sea salt, lite salt, or a salt substitute?) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1STYCompatible with harmonization
Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or seasoned salt, lite salt, or a salt substitute.
- Observed years
- 2013–2023
- Release records
- 5
- Datasets
- 5
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or seasoned salt, lite salt, or a salt substitute. — 2013-2014 · 2015-2016
- Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or sea salt, lite salt, or a salt substitute. — 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2013-2014: DR1TOT_H — Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or seasoned salt, lite salt, or a salt substitute. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or seasoned salt, lite salt, or a salt substitute. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or sea salt, lite salt, or a salt substitute. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or sea salt, lite salt, or a salt substitute. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Did {you/SP} add any salt to {your/her/his} food at the table yesterday? Salt includes ordinary or sea salt, lite salt, or a salt substitute. — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TACARCompatible with harmonization
Alpha-carotene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Alpha-carotene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Alpha-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TALCOCompatible with harmonization
Alcohol (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Alcohol (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Alcohol (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TATOACompatible with harmonization
Added alpha-tocopherol (Vitamin E) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Added alpha-tocopherol (Vitamin E) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TATOCCompatible with harmonization
Vitamin E as alpha-tocopherol (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Vitamin E as alpha-tocopherol (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TB12ACompatible with harmonization
Added vitamin B12 (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Added vitamin B12 (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Added vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TBCARCompatible with harmonization
Beta-carotene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Beta-carotene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Beta-carotene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCAFFCompatible with harmonization
Caffeine (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Caffeine (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Caffeine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCALCCompatible with harmonization
Calcium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Calcium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Calcium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCARBCompatible with harmonization
Carbohydrate (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Carbohydrate (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Carbohydrate (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCHLCompatible with harmonization
Total choline (mg)
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Total choline (mg) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR1TOT_D — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total choline (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCHOLCompatible with harmonization
Cholesterol (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Cholesterol (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Cholesterol (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCOPPCompatible with harmonization
Copper (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Variable names / labels over time
- Copper (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Copper (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TCRYPIndexed code and label stable
Beta-cryptoxanthin (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Beta-cryptoxanthin (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Beta-cryptoxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TFAIndexed code and label stable
Folic acid (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Folic acid (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Folic acid (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TFDFEIndexed code and label stable
Folate as dietary folate equivalents (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Folate as dietary folate equivalents (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Folate as dietary folate equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TFFIndexed code and label stable
Food folate (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Food folate (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Food folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TFIBEIndexed code and label stable
Dietary fiber (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Dietary fiber (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Dietary fiber (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TFOLALabel changed across releases
Total Folate (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total Folate (mcg) — 2003-2004
- Total folate (mcg) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total Folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total folate (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TIRONIndexed code and label stable
Iron (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Iron (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Iron (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TKCALPraxis evidence enriched
Energy (kcal)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Supporting source-evidence notes
CDC/NCHS notes mention these survey or subsample weight variables across the indexed releases: WTDR2D, WTDRD1, WTMEC2YR, WTDR2DPP, WTDRD1PP, WTMECPRP. Do not apply them together; choose the cycle- and subsample-appropriate weight for the releases included in the analysis. Method documentation varies across releases. Praxis flags the affected boundaries for review without automatically calling them scientific method changes.
These notes summarize indexed evidence and method-text signals. They do not supersede the qualified harmonization assessment above.
- Documented weight variables
- WTDR2D · WTDRD1 · WTMEC2YR · WTDR2DPP · WTDRD1PP · WTMECPRP
- Units observed
- Not stated / categorical
- Enriched releases
- 10
- Method-change status
- documentation varies
Method-change assessment
Method documentation varies across cycles
Method documentation or comparability language varies across releases, but Praxis has not confirmed a substantive method change from the captured text alone. Review the flagged boundaries before pooling.
- Releases with method evidence
- 10
- Flagged method boundaries
- 9
- Assessment status
- Method documentation varies across cycles
- Inference rule
- Documentation differences ≠ confirmed method changes
Method / instrument change points and harmonization actions
- 2003-2004 → 2005-2006: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2005-2006 → 2007-2008: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2007-2008 → 2009-2010: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2009-2010 → 2011-2012: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2011-2012 → 2013-2014: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2013-2014 → 2015-2016: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2015-2016 → 2017-2018: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2017-2018 → 2017-2020: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source - 2017-2020 → 2021-2023: Documentation changed — method change not yet confirmed · Evidence: automated documentation comparison. The captured CDC/NCHS method documentation differs from the preceding enriched release. Praxis does not treat a text difference alone as proof that the scientific method changed.
Harmonization action: Review the linked source documents before pooling across this boundary. Until a substantive method/instrument change is confirmed, classify this as documentation variation rather than a scientific discontinuity. Review source
Cycle-by-cycle method chronology
- 2003-2004: DR1TOT_C — The examination protocol and data collection methods are fully documented in the NHANES Dietary Interviewers Procedures Manuals (Centers for Disease Control and Prevention, 2002, Centers for Disease Control and Prevention, 2004). Proxy interviews were conducted for survey participants less than six years of age. Assisted interviews were conducted with survey participants 6 to 11 years of age. Dietary interviews were conducted in English and Spanish. Translators were used to conduct interviews i…
- 2005-2006: DR1TOT_D — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewers procedures manuals (Centers for Disease Control and Prevention, National Health and Nutrition Examination Survey MEC In-Person Dietary Interviewers Procedure Manual, Centers for Disease Control and Prevention, National Health and Nutrition Examination Survey Phone Follow-Up Dietary Interviewer Procedure Manual). Interviews were conducted for survey participants less than six years of age…
- 2007-2008: DR1TOT_E — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewers procedures manuals (In-person interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2007/manuals/manual_dietarymec.pdf; phone follow-up interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2007/manuals/manual_dietarypfu.pdf). Interviews were conducted for survey participants less than six years of age with a proxy who was generally the person most knowledgeable about the survey part…
- 2009-2010: DR1TOT_F — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewers procedures manuals (In-person interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2009/manuals/mec_in_person_dietary_procedures_manual_mar_2010.pdf; phone follow-up interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2009/manuals/phone_follow_up_dietary_procedures_manual_mar_2010.pdf). Interviews were conducted for survey participants less than six years of age with a proxy who w…
- 2011-2012: DR1TOT_G — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewer procedures manuals (In-person interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2011/manuals/mec_in_person_dietary_procedures_manual_jan_2012.pdf phone follow-up interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2011/manuals/phone_follow-up_dietary_procedures.pdf). Interviews were conducted for survey participants less than six years of age with a proxy (who was generally the …
- 2013-2014: DR1TOT_H — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewer procedures manuals (In-person interview: https://wwwn.cdc.gov/nchs/data/nhanes/2013-2014/manuals/2013_mec_in-person_dietary_interview-manual.pdf; phone follow-up interview: https://wwwn.cdc.gov/nchs/data/nhanes/public/2013/manuals/phone_follow-up_dietary_interviewers_manual.pdf). Interviews were conducted for participants less than six years of age with a proxy (who was generally the pers…
- 2015-2016: DR1TOT_I — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewer procedures manuals (In-person interview and phone follow-up interview). Interviews were conducted for participants less than six years of age with a proxy (who was generally the person most knowledgeable about the participant’s intake). Interviews of children ages 6 to 8 were conducted with a proxy and the child present to assist in reporting intake information. Interviews of children age…
- 2017-2018: DR1TOT_J — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewer procedures manuals (In-person interview and phone follow-up interview). Interviews were conducted for participants less than six years of age with a proxy (who was generally the person most knowledgeable about the participant’s intake). Interviews of children aged 6 to 8 were conducted with a proxy and the child was present to assist in reporting intake information. Interviews of children…
- 2017-2020: P_DR1TOT — The examination protocol and data collection methods are fully documented in the NHANES 2017-2018 and 2019-2020 dietary interviewer procedures manuals (in-person interview and phone follow-up interview). Interviews were conducted with a proxy for participants less than six years of age (who was generally the person most knowledgeable about the participant’s intake). Interviews of children aged 6 to 8 were conducted with a proxy and the child was present to assist in reporting intake information…
- 2021-2023: DR1TOT_L — The examination protocol and data collection methods are fully documented in the NHANES dietary interviewer procedures manuals. Interviews were conducted with a proxy for participants less than six years of age (who was generally the person most knowledgeable about the participant’s intake). Interviews of children aged 6 to 8 were conducted with a proxy and the child was present to assist in reporting intake information. Interviews of children aged 9-11, were conducted with the child and the as…
Praxis-enriched cycle evidence
- 2003-2004: DR1TOT_C · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2005-2006: DR1TOT_D · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2007-2008: DR1TOT_E · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2009-2010: DR1TOT_F · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2011-2012: DR1TOT_G · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2013-2014: DR1TOT_H · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2015-2016: DR1TOT_I · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2017-2018: DR1TOT_J · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
- 2017-2020: P_DR1TOT · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2DPP, WTDRD1PP, WTMECPRP · Method evidence captured
- 2021-2023: DR1TOT_L · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTDR2D, WTDRD1, WTMEC2YR · Method evidence captured
Variable names / labels over time
- Energy (kcal) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Energy (kcal) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TLYCOIndexed code and label stable
Lycopene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Lycopene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Lycopene (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TLZIndexed code and label stable
Lutein + zeaxanthin (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Lutein + zeaxanthin (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Lutein + zeaxanthin (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TM161Indexed code and label stable
MFA 16:1 (Hexadecenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 16:1 (Hexadecenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TM181Indexed code and label stable
MFA 18:1 (Octadecenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 18:1 (Octadecenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TM201Indexed code and label stable
MFA 20:1 (Eicosenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 20:1 (Eicosenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TM221Indexed code and label stable
MFA 22:1 (Docosenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 22:1 (Docosenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TMAGNIndexed code and label stable
Magnesium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Magnesium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Magnesium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TMFATIndexed code and label stable
Total monounsaturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total monounsaturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total monounsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TMOISIndexed code and label stable
Moisture (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Moisture (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Moisture (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TNIACIndexed code and label stable
Niacin (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Niacin (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Niacin (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TNUMFLabel changed across releases
Total number of foods reported in the individual foods file
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total number of foods reported in the individual foods file — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012
- Total number of foods/beverages reported in the individual foods file — 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total number of foods reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total number of foods reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total number of foods reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total number of foods reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total number of foods reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total number of foods/beverages reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total number of foods/beverages reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total number of foods/beverages reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total number of foods/beverages reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total number of foods/beverages reported in the individual foods file — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP182Indexed code and label stable
PFA 18:2 (Octadecadienoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 18:2 (Octadecadienoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP183Indexed code and label stable
PFA 18:3 (Octadecatrienoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 18:3 (Octadecatrienoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP184Indexed code and label stable
PFA 18:4 (Octadecatetraenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 18:4 (Octadecatetraenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP204Indexed code and label stable
PFA 20:4 (Eicosatetraenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 20:4 (Eicosatetraenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP205Indexed code and label stable
PFA 20:5 (Eicosapentaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 20:5 (Eicosapentaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP225Indexed code and label stable
PFA 22:5 (Docosapentaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 22:5 (Docosapentaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TP226Indexed code and label stable
PFA 22:6 (Docosahexaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 22:6 (Docosahexaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TPFATIndexed code and label stable
Total polyunsaturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total polyunsaturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total polyunsaturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TPHOSIndexed code and label stable
Phosphorus (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Phosphorus (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Phosphorus (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TPOTAIndexed code and label stable
Potassium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Potassium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Potassium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TPROTIndexed code and label stable
Protein (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Protein (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Protein (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TRETIndexed code and label stable
Retinol (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Retinol (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Retinol (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS040Indexed code and label stable
SFA 4:0 (Butanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 4:0 (Butanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS060Indexed code and label stable
SFA 6:0 (Hexanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 6:0 (Hexanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS080Indexed code and label stable
SFA 8:0 (Octanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 8:0 (Octanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS100Indexed code and label stable
SFA 10:0 (Decanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 10:0 (Decanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS120Indexed code and label stable
SFA 12:0 (Dodecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 12:0 (Dodecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS140Indexed code and label stable
SFA 14:0 (Tetradecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 14:0 (Tetradecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS160Indexed code and label stable
SFA 16:0 (Hexadecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 16:0 (Hexadecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TS180Indexed code and label stable
SFA 18:0 (Octadecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 18:0 (Octadecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TSELEIndexed code and label stable
Selenium (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Selenium (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Selenium (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TSFATIndexed code and label stable
Total saturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total saturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total saturated fatty acids (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TSODILabel changed across releases
Sodium (mg) (adjusted for salt use in food preparation)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Sodium (mg) (adjusted for salt use in food preparation) — 2003-2004 · 2005-2006 · 2007-2008
- Sodium (mg) — 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Sodium (mg) (adjusted for salt use in food preparation) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Sodium (mg) (adjusted for salt use in food preparation) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Sodium (mg) (adjusted for salt use in food preparation) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Sodium (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TSUGRIndexed code and label stable
Total sugars (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total sugars (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total sugars (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TTFATIndexed code and label stable
Total fat (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total fat (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Total fat (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TTHEOIndexed code and label stable
Theobromine (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Theobromine (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Theobromine (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVARAIndexed code and label stable
Vitamin A as retinol activity equivalents (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin A as retinol activity equivalents (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVB1Indexed code and label stable
Thiamin (Vitamin B1) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Thiamin (Vitamin B1) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Thiamin (Vitamin B1) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVB12Indexed code and label stable
Vitamin B12 (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin B12 (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin B12 (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVB2Indexed code and label stable
Riboflavin (Vitamin B2) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Riboflavin (Vitamin B2) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVB6Indexed code and label stable
Vitamin B6 (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin B6 (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin B6 (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVCIndexed code and label stable
Vitamin C (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin C (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin C (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVDIndexed code and label stable
Vitamin D (D2 + D3) (mcg)
- Observed years
- 2007–2023
- Release records
- 8
- Datasets
- 8
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin D (D2 + D3) (mcg) — 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2007-2008: DR1TOT_E — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin D (D2 + D3) (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TVKIndexed code and label stable
Vitamin K (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin K (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Vitamin K (mcg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TWSLabel changed across releases
Tap Water Source
- Observed years
- 2003–2016
- Release records
- 7
- Datasets
- 7
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Tap Water Source — 2003-2004
- When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Tap Water Source — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TWSZIndexed code and label stable
When you drink tap water, what is the main source of the tap water?
- Observed years
- 2017–2023
- Release records
- 3
- Datasets
- 3
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- When you drink tap water, what is the main source of the tap water? — 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2017-2018: DR1TOT_J — When you drink tap water, what is the main source of the tap water? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — When you drink tap water, what is the main source of the tap water? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — When you drink tap water, what is the main source of the tap water? — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1TZINCIndexed code and label stable
Zinc (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Zinc (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DR1TOT_F — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DR1TOT_G — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DR1TOT_H — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DR1TOT_I — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DR1TOT_J — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DR1TOT — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2021-2023: DR1TOT_L — Zinc (mg) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR2_020Indexed code and label stable
What time did you begin to eat/drink the meal/food?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- What time did you begin to eat/drink the meal/food? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2_030ZIndexed code and label stable
Name of eating occasion
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Name of eating occasion — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Name of eating occasion — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2_040ZLabel changed across releases
Was this food eaten at home?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Was this food eaten at home? — 2003-2004
- Did you eat this meal at home? — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Was this food eaten at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Did you eat this meal at home? — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2_300Indexed code and label stable
Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2TOT_C — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2005-2006: DR2TOT_D — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2_320Indexed code and label stable
Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR2TOT_C — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2_320ZIndexed code and label stable
Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR2TOT_D — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2_330Indexed code and label stable
Total tap water drank yesterday - including filtered tap water and water from a drinking fountain.
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR2TOT_C — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2_330ZIndexed code and label stable
Total tap water drank yesterday - including filtered tap water and water from a drinking fountain.
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR2TOT_D — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Total tap water drank yesterday - including filtered tap water and water from a drinking fountain. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2BWATRIndexed code and label stable
Total bottled water drank yesterday. (gm)
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total bottled water drank yesterday. (gm) — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR2TOT_C — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2BWATZIndexed code and label stable
Total bottled water drank yesterday. (gm)
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total bottled water drank yesterday. (gm) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR2TOT_D — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Total bottled water drank yesterday. (gm) — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2CCMNMLabel changed across releases
Combination food number
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Combination food number — 2003-2004
- Combination food number (sequential number) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Combination food number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Combination food number (sequential number) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2CCMTXIndexed code and label stable
Combination food type
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Combination food type — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Combination food type — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2CWATRIndexed code and label stable
Plain carbonated water drank yesterday - including unsweetened carbonated water, seltzer water, club soda, and carbonated bottled water such as Perrier.
- Observed years
- 2003–2004
- Release records
- 1
- Datasets
- 1
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Plain carbonated water drank yesterday - including unsweetened carbonated water, seltzer water, club soda, and carbonated bottled water such as Perrier. — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR2TOT_C — Plain carbonated water drank yesterday - including unsweetened carbonated water, seltzer water, club soda, and carbonated bottled water such as Perrier. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2DAYMultiple dataset contexts
Intake day of the week
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Intake day of the week — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2003-2004: DR2TOT_C — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2TOT_D — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DS2IDS_E — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2007-2008: DS2TOT_E — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DS2IDS_F — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2009-2010: DS2TOT_F — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DS2IDS_G — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2011-2012: DS2TOT_G — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DS2IDS_H — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2013-2014: DS2TOT_H — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DS2IDS_I — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2015-2016: DS2TOT_I — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DS2IDS_J — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2018: DS2TOT_J — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DS2IDS — Intake day of the week — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DS2TOT — Intake day of the week — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Intake day of the week — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Intake day of the week — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2DBIHLabel and dataset context changed
Number of days between intake day and the day of family questionnaire administered in the household.
- Observed years
- 2007–2023
- Release records
- 28
- Datasets
- 28
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Number of days between intake day and the day of family questionnaire administered in the household. — 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
- # of days b/w intake and HH interview — 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020
Cycle-by-cycle release history
- 2007-2008: DR2IFF_E — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DS2IDS_F — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2009-2010: DS2TOT_F — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DS2IDS_G — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2011-2012: DS2TOT_G — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DS2IDS_H — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2013-2014: DS2TOT_H — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DS2IDS_I — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2015-2016: DS2TOT_I — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DS2IDS_J — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2018: DS2TOT_J — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DS2IDS — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DS2TOT — # of days b/w intake and HH interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Number of days between intake day and the day of family questionnaire administered in the household. — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2DRSTZMultiple dataset contexts
Dietary recall status
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Dietary recall status — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2003-2004: DR2TOT_C — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2TOT_D — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DS2IDS_E — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2007-2008: DS2TOT_E — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DS2IDS_F — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2009-2010: DS2TOT_F — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DS2IDS_G — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2011-2012: DS2TOT_G — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DS2IDS_H — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2013-2014: DS2TOT_H — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DS2IDS_I — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2015-2016: DS2TOT_I — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DS2IDS_J — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2018: DS2TOT_J — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DS2IDS — Dietary recall status — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DS2TOT — Dietary recall status — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Dietary recall status — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Dietary recall status — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2EXMERLabel and dataset context changed
Interviewer ID code
- Observed years
- 2003–2023
- Release records
- 34
- Datasets
- 34
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Interviewer ID code — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
- — 2003-2004
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2003-2004: DR2TOT_C — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2TOT_D — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DS2IDS_E — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2007-2008: DS2TOT_E — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DS2IDS_F — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2009-2010: DS2TOT_F — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DS2IDS_G — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2011-2012: DS2TOT_G — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DS2IDS_H — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2013-2014: DS2TOT_H — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2TOT_I — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DS2IDS_I — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2015-2016: DS2TOT_I — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DS2IDS_J — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2018: DS2TOT_J — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DS2IDS — Interviewer ID code — Dietary Supplement Use 24-Hour - Individual Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DS2TOT — Interviewer ID code — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Interviewer ID code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Interviewer ID code — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2FSIndexed code and label stable
Where did you get (this/most of the ingredients for this) {FOODNAME}?
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Where did you get (this/most of the ingredients for this) {FOODNAME}? — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2HELPMultiple dataset contexts
Who helped in responding for this interview
- Observed years
- 2015–2023
- Release records
- 7
- Datasets
- 7
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Who helped in responding for this interview — 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2015-2016: DR2TOT_I — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2015-2016: DS2TOT_I — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2018: DR2TOT_J — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2018: DS2TOT_J — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2017-2020: P_DR2TOT — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2017-2020: P_DS2TOT — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2021-2023: DR2TOT_L — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
DR2HELPDMultiple dataset contexts
Who helped in responding for this interview
- Observed years
- 2003–2014
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Who helped in responding for this interview — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014
Cycle-by-cycle release history
- 2003-2004: DR2TOT_C — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2005-2006: DR2TOT_D — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DR2TOT_E — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2007-2008: DS2TOT_E — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2009-2010: DR2TOT_F — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2009-2010: DS2TOT_F — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2011-2012: DR2TOT_G — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2011-2012: DS2TOT_G — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
- 2013-2014: DR2TOT_H — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, Second Day (Dietary)
- 2013-2014: DS2TOT_H — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, Second Day (Dietary)
DR2IACARIndexed code and label stable
Alpha-carotene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Alpha-carotene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IALCOIndexed code and label stable
Alcohol (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Alcohol (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Alcohol (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IATOAIndexed code and label stable
Added alpha-tocopherol (Vitamin E) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Added alpha-tocopherol (Vitamin E) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IATOCIndexed code and label stable
Vitamin E as alpha-tocopherol (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin E as alpha-tocopherol (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IB12AIndexed code and label stable
Added vitamin B12 (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Added vitamin B12 (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IBCARIndexed code and label stable
Beta-carotene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Beta-carotene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Beta-carotene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICAFFIndexed code and label stable
Caffeine (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Caffeine (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Caffeine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICALCIndexed code and label stable
Calcium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Calcium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Calcium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICARBIndexed code and label stable
Carbohydrate (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Carbohydrate (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Carbohydrate (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICHLIndexed code and label stable
Total choline (mg)
- Observed years
- 2005–2023
- Release records
- 9
- Datasets
- 9
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total choline (mg) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2005-2006: DR2IFF_D — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total choline (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICHOLIndexed code and label stable
Cholesterol (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Cholesterol (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Cholesterol (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICOPPIndexed code and label stable
Copper (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Copper (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Copper (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ICRYPIndexed code and label stable
Beta-cryptoxanthin (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Beta-cryptoxanthin (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IFAIndexed code and label stable
Folic acid (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Folic acid (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Folic acid (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IFDCDIndexed code and label stable
USDA food code
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- USDA food code — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — USDA food code — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IFDFEIndexed code and label stable
Folate as dietary folate equivalents (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Folate as dietary folate equivalents (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IFFIndexed code and label stable
Food folate (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Food folate (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Food folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IFIBEIndexed code and label stable
Dietary fiber (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Dietary fiber (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Dietary fiber (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IFOLALabel changed across releases
Total Folate (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total Folate (mcg) — 2003-2004
- Total folate (mcg) — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Total Folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total folate (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IGRMSIndexed code and label stable
Gram weight of the food/individual component
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Gram weight of the food/individual component — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Gram weight of the food/individual component — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IIRONIndexed code and label stable
Iron (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Iron (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Iron (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IKCALIndexed code and label stable
Energy (kcal)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Energy (kcal) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Energy (kcal) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ILINELabel changed across releases
Food/individual component number
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Food/individual component number — 2003-2004
- Food/Individual component number — 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Food/individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Food/Individual component number — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ILYCOIndexed code and label stable
Lycopene (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Lycopene (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Lycopene (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ILZIndexed code and label stable
Lutein + zeaxanthin (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Lutein + zeaxanthin (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IM161Indexed code and label stable
MFA 16:1 (Hexadecenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 16:1 (Hexadecenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IM181Indexed code and label stable
MFA 18:1 (Octadecenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 18:1 (Octadecenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IM201Indexed code and label stable
MFA 20:1 (Eicosenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 20:1 (Eicosenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IM221Indexed code and label stable
MFA 22:1 (Docosenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- MFA 22:1 (Docosenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IMAGNIndexed code and label stable
Magnesium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Magnesium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Magnesium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IMFATIndexed code and label stable
Total monounsaturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total monounsaturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IMOISIndexed code and label stable
Moisture (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Moisture (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Moisture (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2INIACIndexed code and label stable
Niacin (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Niacin (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Niacin (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP182Indexed code and label stable
PFA 18:2 (Octadecadienoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 18:2 (Octadecadienoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP183Indexed code and label stable
PFA 18:3 (Octadecatrienoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 18:3 (Octadecatrienoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP184Indexed code and label stable
PFA 18:4 (Octadecatetraenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 18:4 (Octadecatetraenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP204Indexed code and label stable
PFA 20:4 (Eicosatetraenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 20:4 (Eicosatetraenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP205Indexed code and label stable
PFA 20:5 (Eicosapentaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 20:5 (Eicosapentaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP225Indexed code and label stable
PFA 22:5 (Docosapentaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 22:5 (Docosapentaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IP226Indexed code and label stable
PFA 22:6 (Docosahexaenoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- PFA 22:6 (Docosahexaenoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IPFATIndexed code and label stable
Total polyunsaturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total polyunsaturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IPHOSIndexed code and label stable
Phosphorus (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Phosphorus (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Phosphorus (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IPOTAIndexed code and label stable
Potassium (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Potassium (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Potassium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IPROTIndexed code and label stable
Protein (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Protein (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Protein (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IRETIndexed code and label stable
Retinol (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Retinol (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Retinol (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS040Indexed code and label stable
SFA 4:0 (Butanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 4:0 (Butanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS060Indexed code and label stable
SFA 6:0 (Hexanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 6:0 (Hexanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS080Indexed code and label stable
SFA 8:0 (Octanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 8:0 (Octanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS100Indexed code and label stable
SFA 10:0 (Decanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 10:0 (Decanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS120Indexed code and label stable
SFA 12:0 (Dodecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 12:0 (Dodecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS140Indexed code and label stable
SFA 14:0 (Tetradecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 14:0 (Tetradecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 14:0 (Tetradecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS160Indexed code and label stable
SFA 16:0 (Hexadecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 16:0 (Hexadecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 16:0 (Hexadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IS180Indexed code and label stable
SFA 18:0 (Octadecanoic) (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- SFA 18:0 (Octadecanoic) (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — SFA 18:0 (Octadecanoic) (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ISELEIndexed code and label stable
Selenium (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Selenium (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Selenium (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ISFATIndexed code and label stable
Total saturated fatty acids (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total saturated fatty acids (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total saturated fatty acids (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ISODILabel changed across releases
Sodium (mg)(adjusted for salt use in food preparation)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Sodium (mg)(adjusted for salt use in food preparation) — 2003-2004 · 2005-2006 · 2007-2008
- Sodium (mg) — 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Sodium (mg)(adjusted for salt use in food preparation) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Sodium (mg)(adjusted for salt use in food preparation) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Sodium (mg)(adjusted for salt use in food preparation) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Sodium (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ISUGRIndexed code and label stable
Total sugars (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total sugars (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total sugars (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ITFATIndexed code and label stable
Total fat (gm)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Total fat (gm) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Total fat (gm) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2ITHEOIndexed code and label stable
Theobromine (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Theobromine (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Theobromine (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IVARAIndexed code and label stable
Vitamin A as retinol activity equivalents (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin A as retinol activity equivalents (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Vitamin A as retinol activity equivalents (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IVB1Indexed code and label stable
Thiamin (Vitamin B1) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Thiamin (Vitamin B1) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Thiamin (Vitamin B1) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IVB12Indexed code and label stable
Vitamin B12 (mcg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin B12 (mcg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Vitamin B12 (mcg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IVB2Indexed code and label stable
Riboflavin (Vitamin B2) (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Riboflavin (Vitamin B2) (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Riboflavin (Vitamin B2) (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IVB6Indexed code and label stable
Vitamin B6 (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin B6 (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Vitamin B6 (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
DR2IVCIndexed code and label stable
Vitamin C (mg)
- Observed years
- 2003–2023
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified harmonization assessment unavailable
Praxis has not returned a qualified current-snapshot assessment for this variable. Do not infer cross-cycle equivalence from catalog or enrichment evidence alone.
Variable names / labels over time
- Vitamin C (mg) — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2003-2004: DR2IFF_C — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2005-2006: DR2IFF_D — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2007-2008: DR2IFF_E — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2009-2010: DR2IFF_F — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2011-2012: DR2IFF_G — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2013-2014: DR2IFF_H — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2015-2016: DR2IFF_I — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2018: DR2IFF_J — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2017-2020: P_DR2IFF — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)
- 2021-2023: DR2IFF_L — Vitamin C (mg) — Dietary Interview - Individual Foods, Second Day (Dietary)