Harmonization summary
1,224 label-stable codes
- Label changes detected
- 3
- Multiple dataset contexts
- 62
- Unique codes
- 1,286
- Enriched codes in this report
- 3
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.
1,286matching variable codes
1,467 release records across 88 datasets and 1 cycles.
Search scope
Filtered NHANES variable history
Cycle: 2021-2023.
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.
ACD010ACompatible with harmonization
What language(s) {do you/does SP} usually speak at home?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 2001-2002 → 2003-2004 · 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What language(s) {do you/does SP} usually speak at home? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ACQ_L — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
ACD010BCompatible with harmonization
What language(s) {do you/does SP} usually speak at home?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 2001-2002 → 2003-2004 · 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What language(s) {do you/does SP} usually speak at home? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ACQ_L — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
ACD010CCompatible with harmonization
What language(s) {do you/does SP} usually speak at home?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 2001-2002 → 2003-2004 · 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What language(s) {do you/does SP} usually speak at home? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ACQ_L — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
ACD040Compatible with harmonization
Now I'm going to ask you about language use. What language(s) {do you/does SP} usually speak at home? {Do you/Does he/Does she} speak only Spanish, more Spanish than English, both equally, more English than Spanish, or only English?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Variable names / labels over time
- Now I'm going to ask you about language use. What language(s) {do you/does SP} usually speak at home? {Do you/Does he/Does she} speak only Spanish, more Spanish than English, both equally, more English than Spanish, or only English? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ACQ_L — Now I'm going to ask you about language use. What language(s) {do you/does SP} usually speak at home? {Do you/Does he/Does she} speak only Spanish, more Spanish than English, both equally, more English than Spanish, or only English? — Acculturation (Questionnaire)
AGQ030Compatible with harmonization
During the past 12 months, {have you/has SP} had an episode of hay fever?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 12 months, {have you/has SP} had an episode of hay fever? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: MCQ_L — During the past 12 months, {have you/has SP} had an episode of hay fever? — Medical Conditions (Questionnaire)
ALD020Compatible with harmonization
During your life, on how many days have you had at least one drink of alcohol?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 2005-2006 · 2005-2006 → 2007-2008 · 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During your life, on how many days have you had at least one drink of alcohol? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQY_L_R — During your life, on how many days have you had at least one drink of alcohol? — Alcohol Use - Youth (Questionnaire) — Note: RDC Only
ALD030Compatible with harmonization
During the past 30 days, on how many days did you have at least one drink of alcohol?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 2005-2006 · 2005-2006 → 2007-2008 · 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 30 days, on how many days did you have at least one drink of alcohol? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQY_L_R — During the past 30 days, on how many days did you have at least one drink of alcohol? — Alcohol Use - Youth (Questionnaire) — Note: RDC Only
ALD040Compatible with harmonization
During the past 30 days, on how many days did you have {DISPLAY NUMBER} or more drinks of alcohol in a row, that is, within a couple of hours?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 2005-2006 · 2005-2006 → 2007-2008 · 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 30 days, on how many days did you have {DISPLAY NUMBER} or more drinks of alcohol in a row, that is, within a couple of hours? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQY_L_R — During the past 30 days, on how many days did you have {DISPLAY NUMBER} or more drinks of alcohol in a row, that is, within a couple of hours? — Alcohol Use - Youth (Questionnaire) — Note: RDC Only
ALQ010Compatible with harmonization
How old were you when you had your first drink of alcohol, other than a few sips?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 2005-2006 · 2005-2006 → 2007-2008 · 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- How old were you when you had your first drink of alcohol, other than a few sips? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQY_L_R — How old were you when you had your first drink of alcohol, other than a few sips? — Alcohol Use - Youth (Questionnaire) — Note: RDC Only
ALQ111Compatible with harmonization
In your entire life, have you had at least 1 drink of any kind of alcohol, not counting small tastes or sips? By a drink, I mean a 12 oz. beer, a 5 oz. glass of wine, or one and a half ounces of liquor.
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- In your entire life, have you had at least 1 drink of any kind of alcohol, not counting small tastes or sips? By a drink, I mean a 12 oz. beer, a 5 oz. glass of wine, or one and a half ounces of liquor. — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — In your entire life, have you had at least 1 drink of any kind of alcohol, not counting small tastes or sips? By a drink, I mean a 12 oz. beer, a 5 oz. glass of wine, or one and a half ounces of liquor. — Alcohol Use (Questionnaire)
ALQ121Compatible with harmonization
During the past 12 months, about how often did you drink any type of alcoholic beverage? PROBE: In other words, how many days per week, per month, or per year did you drink?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 12 months, about how often did you drink any type of alcoholic beverage? PROBE: In other words, how many days per week, per month, or per year did you drink? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — During the past 12 months, about how often did you drink any type of alcoholic beverage? PROBE: In other words, how many days per week, per month, or per year did you drink? — Alcohol Use (Questionnaire)
ALQ130Compatible with harmonization
During the past 12 months, on those days that you drank alcoholic beverages, on average, how many drinks did you have? (By a drink, I mean a 12 oz. beer, a 5 oz. glass of wine, or one and a half ounces of liquor.)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Variable names / labels over time
- During the past 12 months, on those days that you drank alcoholic beverages, on average, how many drinks did you have? (By a drink, I mean a 12 oz. beer, a 5 oz. glass of wine, or one and a half ounces of liquor.) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — During the past 12 months, on those days that you drank alcoholic beverages, on average, how many drinks did you have? (By a drink, I mean a 12 oz. beer, a 5 oz. glass of wine, or one and a half ounces of liquor.) — Alcohol Use (Questionnaire)
ALQ142Compatible with harmonization
During the past 12 months, about how often did you have {DISPLAY NUMBER} or more drinks of any alcoholic beverage? PROBE: In other words, how many days per week, per month, or per year did you have {DISPLAY NUMBER} or more drinks in a single day?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 12 months, about how often did you have {DISPLAY NUMBER} or more drinks of any alcoholic beverage? PROBE: In other words, how many days per week, per month, or per year did you have {DISPLAY NUMBER} or more drinks in a single day? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — During the past 12 months, about how often did you have {DISPLAY NUMBER} or more drinks of any alcoholic beverage? PROBE: In other words, how many days per week, per month, or per year did you have {DISPLAY NUMBER} or more drinks in a single day? — Alcohol Use (Questionnaire)
ALQ151Compatible with harmonization
Was there ever a time or times in your life when you drank {DISPLAY NUMBER} or more drinks of any kind of alcoholic beverage almost every day?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Was there ever a time or times in your life when you drank {DISPLAY NUMBER} or more drinks of any kind of alcoholic beverage almost every day? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — Was there ever a time or times in your life when you drank {DISPLAY NUMBER} or more drinks of any kind of alcoholic beverage almost every day? — Alcohol Use (Questionnaire)
ALQ170Compatible with harmonization
Considering all types of alcoholic beverages, during the past 30 days, how many times did you have {DISPLAY NUMBER} or more drinks on an occasion?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Considering all types of alcoholic beverages, during the past 30 days, how many times did you have {DISPLAY NUMBER} or more drinks on an occasion? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — Considering all types of alcoholic beverages, during the past 30 days, how many times did you have {DISPLAY NUMBER} or more drinks on an occasion? — Alcohol Use (Questionnaire)
ALQ270Compatible with harmonization
During the past 12 months, about how often did you have {DISPLAY NUMBER} or more drinks in a period of two hours or less?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 12 months, about how often did you have {DISPLAY NUMBER} or more drinks in a period of two hours or less? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — During the past 12 months, about how often did you have {DISPLAY NUMBER} or more drinks in a period of two hours or less? — Alcohol Use (Questionnaire)
ALQ280Compatible with harmonization
During the past 12 months, about how often did you have 8 or more drinks in a single day?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- During the past 12 months, about how often did you have 8 or more drinks in a single day? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: ALQ_L — During the past 12 months, about how often did you have 8 or more drinks in a single day? — Alcohol Use (Questionnaire)
AUQ054Compatible with harmonization
These next questions are about {your/SP's} hearing. Which statement best describes {your/SP's} hearing (without a hearing aid, personal sound amplifier, or other listening devices)? Would you say {your/his/her} hearing is excellent, good, that {you have/s/he has} a little trouble, moderate trouble, a lot of trouble, or {are you/is s/he} deaf?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 2011-2012 → 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- These next questions are about {your/SP's} hearing. Which statement best describes {your/SP's} hearing (without a hearing aid, personal sound amplifier, or other listening devices)? Would you say {your/his/her} hearing is excellent, good, that {you have/s/he has} a little trouble, moderate trouble, a lot of trouble, or {are you/is s/he} deaf? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — These next questions are about {your/SP's} hearing. Which statement best describes {your/SP's} hearing (without a hearing aid, personal sound amplifier, or other listening devices)? Would you say {your/his/her} hearing is excellent, good, that {you have/s/he has} a little trouble, moderate trouble, a lot of trouble, or {are you/is s/he} deaf? — Audiometry (Questionnaire)
AUQ101Compatible with harmonization
How often {do you/does SP} have difficulty hearing and understanding if there is background noise, for example, when other people are talking, TV or radio is on, or children are playing? Would you say...
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- How often {do you/does SP} have difficulty hearing and understanding if there is background noise, for example, when other people are talking, TV or radio is on, or children are playing? Would you say... — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — How often {do you/does SP} have difficulty hearing and understanding if there is background noise, for example, when other people are talking, TV or radio is on, or children are playing? Would you say... — Audiometry (Questionnaire)
AUQ144Compatible with harmonization
A hearing test by a specialist is one that is done in a sound proof booth or room, or with headphones. Hearing specialists include audiologists, ear nose and throat doctors, and trained technicians or occupational nurses. When was the last time {you /SP} had {your/his/her} hearing tested by a hearing specialist?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 2011-2012 → 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- A hearing test by a specialist is one that is done in a sound proof booth or room, or with headphones. Hearing specialists include audiologists, ear nose and throat doctors, and trained technicians or occupational nurses. When was the last time {you /SP} had {your/his/her} hearing tested by a hearing specialist? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — A hearing test by a specialist is one that is done in a sound proof booth or room, or with headphones. Hearing specialists include audiologists, ear nose and throat doctors, and trained technicians or occupational nurses. When was the last time {you /SP} had {your/his/her} hearing tested by a hearing specialist? — Audiometry (Questionnaire)
AUQ410ACompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410BCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410CCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410DCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410ECompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410FCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410GCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410HCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410ICompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
AUQ410JCompatible with harmonization
What are the main causes of {your/SP's} hearing loss?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What are the main causes of {your/SP's} hearing loss? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: AUQ_L — What are the main causes of {your/SP's} hearing loss? — Audiometry (Questionnaire)
BAARFC11Evidence developing
MRT cond. 1, trial 1, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 1, trial 1, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 1, trial 1, reason stopped — Balance (Examination)
BAARFC12Evidence developing
MRT cond. 1, trial 2, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 1, trial 2, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 1, trial 2, reason stopped — Balance (Examination)
BAARFC21Evidence developing
MRT cond. 2, trial 1, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 2, trial 1, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 2, trial 1, reason stopped — Balance (Examination)
BAARFC22Evidence developing
MRT cond. 2, trial 2, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 2, trial 2, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 2, trial 2, reason stopped — Balance (Examination)
BAARFC31Evidence developing
MRT cond. 3, trial 1, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 3, trial 1, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 3, trial 1, reason stopped — Balance (Examination)
BAARFC32Evidence developing
MRT cond. 3, trial 2, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 3, trial 2, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 3, trial 2, reason stopped — Balance (Examination)
BAARFC41Evidence developing
MRT cond. 4, trial 1, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 4, trial 1, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 4, trial 1, reason stopped — Balance (Examination)
BAARFC42Evidence developing
MRT cond. 4, trial 2, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 4, trial 2, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 4, trial 2, reason stopped — Balance (Examination)
BAARFC51Evidence developing
MRT cond. 5, trial 1, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 5, trial 1, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 5, trial 1, reason stopped — Balance (Examination)
BAARFC52Evidence developing
MRT cond. 5, trial 2, reason stopped
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 5, trial 2, reason stopped — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 5, trial 2, reason stopped — Balance (Examination)
BAQ110Compatible with harmonization
Can stand on your own?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 2001-2002 → 2003-2004 · 2003-2004 → 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.
- 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Can stand on your own? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Can stand on your own? — Balance (Examination)
BAQ121Evidence developing
Are you currently wearing a leg brace?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Are you currently wearing a leg brace? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Are you currently wearing a leg brace? — Balance (Examination)
BAQ125Evidence developing
Injury to foot, leg, or hip
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Injury to foot, leg, or hip — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Injury to foot, leg, or hip — Balance (Examination)
BAQ132Evidence developing
Problems with dizzy, past 24 hours
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Problems with dizzy, past 24 hours — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Problems with dizzy, past 24 hours — Balance (Examination)
BAQ140Evidence developing
Last 12 months, fallen due to dizziness
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Last 12 months, fallen due to dizziness — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Last 12 months, fallen due to dizziness — Balance (Examination)
BAQ150Evidence developing
Do you have neck pain now?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Do you have neck pain now? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Do you have neck pain now? — Balance (Examination)
BAQ160Evidence developing
Have you ever had surgery on your neck?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Have you ever had surgery on your neck? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Have you ever had surgery on your neck? — Balance (Examination)
BAQ170Evidence developing
Neck problem lasted more than 6 weeks
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Neck problem lasted more than 6 weeks — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Neck problem lasted more than 6 weeks — Balance (Examination)
BAQ173Evidence developing
Are you okay to begin this balance test?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Are you okay to begin this balance test? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Are you okay to begin this balance test? — Balance (Examination)
BAQ201Evidence developing
Can you move head 30 degrees left/right?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Can you move head 30 degrees left/right? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Can you move head 30 degrees left/right? — Balance (Examination)
BAQ321AEvidence developing
The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... vertigo - a sensation of spinning, tilting, swaying or rocking of {yourself/himself/herself/SP's} or {your/his/her/SP's} surroundings?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... vertigo - a sensation of spinning, tilting, swaying or rocking of {yourself/himself/herself/SP's} or {your/his/her/SP's} surroundings? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... vertigo - a sensation of spinning, tilting, swaying or rocking of {yourself/himself/herself/SP's} or {your/his/her/SP's} surroundings? — Balance (Questionnaire)
BAQ321BEvidence developing
The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... blurring of {your/his/her/SP's} vision when {you move your/he moves his/she moves her/SP moves SP's} head?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... blurring of {your/his/her/SP's} vision when {you move your/he moves his/she moves her/SP moves SP's} head? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... blurring of {your/his/her/SP's} vision when {you move your/he moves his/she moves her/SP moves SP's} head? — Balance (Questionnaire)
BAQ321CEvidence developing
The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... unsteadiness - a feeling of being off-balance or not stable when standing or sitting upright?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... unsteadiness - a feeling of being off-balance or not stable when standing or sitting upright? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... unsteadiness - a feeling of being off-balance or not stable when standing or sitting upright? — Balance (Questionnaire)
BAQ321DEvidence developing
The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... light-headedness - without a sense of motion, OR fainting - a feeling {you are/he is/she is/SP is} going to pass out or faint
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... light-headedness - without a sense of motion, OR fainting - a feeling {you are/he is/she is/SP is} going to pass out or faint — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... light-headedness - without a sense of motion, OR fainting - a feeling {you are/he is/she is/SP is} going to pass out or faint — Balance (Questionnaire)
BAQ341Evidence developing
This next section focuses on {your/SP's} most bothersome symptom in the past 12 months. During the past 12 months, which one of these problems bothered {you/SP} the most?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- This next section focuses on {your/SP's} most bothersome symptom in the past 12 months. During the past 12 months, which one of these problems bothered {you/SP} the most? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — This next section focuses on {your/SP's} most bothersome symptom in the past 12 months. During the past 12 months, which one of these problems bothered {you/SP} the most? — Balance (Questionnaire)
BAQ391AEvidence developing
During the past 12 months, were {your/SP's} episodes for {your/his/her/SP's} {RESPONSE FOR BAQ.341} accompanied by the following?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- During the past 12 months, were {your/SP's} episodes for {your/his/her/SP's} {RESPONSE FOR BAQ.341} accompanied by the following? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — During the past 12 months, were {your/SP's} episodes for {your/his/her/SP's} {RESPONSE FOR BAQ.341} accompanied by the following? — Balance (Questionnaire)
BAQ391BEvidence developing
During the past 12 months, were {your/SP's} episodes for {your/his/her/SP's} {RESPONSE FOR BAQ.341} accompanied by the following?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- During the past 12 months, were {your/SP's} episodes for {your/his/her/SP's} {RESPONSE FOR BAQ.341} accompanied by the following? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — During the past 12 months, were {your/SP's} episodes for {your/his/her/SP's} {RESPONSE FOR BAQ.341} accompanied by the following? — Balance (Questionnaire)
BAQ401Evidence developing
During the past 12 months, {did your/SP's} dizziness or balance problem(s) prevent {you/SP} from doing things {you/he/she/SP} otherwise would do, such as, work, school, or other scheduled activities?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- During the past 12 months, {did your/SP's} dizziness or balance problem(s) prevent {you/SP} from doing things {you/he/she/SP} otherwise would do, such as, work, school, or other scheduled activities? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — During the past 12 months, {did your/SP's} dizziness or balance problem(s) prevent {you/SP} from doing things {you/he/she/SP} otherwise would do, such as, work, school, or other scheduled activities? — Balance (Questionnaire)
BAQ421Evidence developing
During the past 12 months, how much of a problem was {your/his/her/SP's} problem with balance, blurred vision, or light-headedness and fainting? Was it...
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- During the past 12 months, how much of a problem was {your/his/her/SP's} problem with balance, blurred vision, or light-headedness and fainting? Was it... — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — During the past 12 months, how much of a problem was {your/his/her/SP's} problem with balance, blurred vision, or light-headedness and fainting? Was it... — Balance (Questionnaire)
BAQ431Evidence developing
Think of any time {you have/SP has} had symptoms of dizziness, imbalance, etc. {Have you/Has SP} ever seen a doctor or other health professional, including emergency room physicians, about {your/his/her/SP's} problem(s) with balance, blurred vision, or light-headedness and fainting?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- Think of any time {you have/SP has} had symptoms of dizziness, imbalance, etc. {Have you/Has SP} ever seen a doctor or other health professional, including emergency room physicians, about {your/his/her/SP's} problem(s) with balance, blurred vision, or light-headedness and fainting? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — Think of any time {you have/SP has} had symptoms of dizziness, imbalance, etc. {Have you/Has SP} ever seen a doctor or other health professional, including emergency room physicians, about {your/his/her/SP's} problem(s) with balance, blurred vision, or light-headedness and fainting? — Balance (Questionnaire)
BAQ491Evidence developing
{Have you/Has SP} ever tried anything to treat {your/his/her/SP's} problem(s) with balance, blurred vision, or light-headedness and fainting?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- {Have you/Has SP} ever tried anything to treat {your/his/her/SP's} problem(s) with balance, blurred vision, or light-headedness and fainting? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — {Have you/Has SP} ever tried anything to treat {your/his/her/SP's} problem(s) with balance, blurred vision, or light-headedness and fainting? — Balance (Questionnaire)
BAQ530Evidence developing
The next questions are about frequency of falling and associated injuries. By "falling", we mean unexpectedly or unintentionally dropping to a lower surface - the floor or ground - for example, from a standing, seated, walking, or bending position. During the past 5 years, how many times {have you/has SP} fallen?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- The next questions are about frequency of falling and associated injuries. By "falling", we mean unexpectedly or unintentionally dropping to a lower surface - the floor or ground - for example, from a standing, seated, walking, or bending position. During the past 5 years, how many times {have you/has SP} fallen? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — The next questions are about frequency of falling and associated injuries. By "falling", we mean unexpectedly or unintentionally dropping to a lower surface - the floor or ground - for example, from a standing, seated, walking, or bending position. During the past 5 years, how many times {have you/has SP} fallen? — Balance (Questionnaire)
BAQ550Evidence developing
During the past 12 months, how many times {have you/has SP} fallen?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- During the past 12 months, how many times {have you/has SP} fallen? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — During the past 12 months, how many times {have you/has SP} fallen? — Balance (Questionnaire)
BAQ560Evidence developing
During the past 12 months, did {you/SP} have an injury that resulted from falling?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- During the past 12 months, did {you/SP} have an injury that resulted from falling? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAQ_L — During the past 12 months, did {you/SP} have an injury that resulted from falling? — Balance (Questionnaire)
BAX5STATEvidence developing
Eligibility for Condition 5
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Eligibility for Condition 5 — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Eligibility for Condition 5 — Balance (Examination)
BAXMSTATEvidence developing
MRT exam status
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT exam status — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT exam status — Balance (Examination)
BAXPF11Evidence developing
MRT cond. 1, trial 1, eyes open
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 1, trial 1, eyes open — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 1, trial 1, eyes open — Balance (Examination)
BAXPF12Evidence developing
MRT cond. 1, trial 2, eyes open
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 1, trial 2, eyes open — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 1, trial 2, eyes open — Balance (Examination)
BAXPF21Evidence developing
MRT cond. 2, trial 1, eyes closed
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 2, trial 1, eyes closed — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 2, trial 1, eyes closed — Balance (Examination)
BAXPF22Evidence developing
MRT cond. 2, trial 2, eyes closed
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 2, trial 2, eyes closed — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 2, trial 2, eyes closed — Balance (Examination)
BAXPF31Evidence developing
MRT cond. 3, trial 1, eyes open
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 3, trial 1, eyes open — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 3, trial 1, eyes open — Balance (Examination)
BAXPF32Evidence developing
MRT cond. 3, trial 2, eyes open
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 3, trial 2, eyes open — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 3, trial 2, eyes open — Balance (Examination)
BAXPF41Evidence developing
MRT cond. 4, trial 1, eyes closed
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 4, trial 1, eyes closed — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 4, trial 1, eyes closed — Balance (Examination)
BAXPF42Evidence developing
MRT cond. 4, trial 2, eyes closed
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 4, trial 2, eyes closed — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 4, trial 2, eyes closed — Balance (Examination)
BAXPF51Evidence developing
MRT cond. 5, trial 1, eyes closed
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 5, trial 1, eyes closed — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 5, trial 1, eyes closed — Balance (Examination)
BAXPF52Evidence developing
MRT cond. 5, trial 2, eyes closed
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 5, trial 2, eyes closed — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 5, trial 2, eyes closed — Balance (Examination)
BAXRXNCEvidence developing
Reason for partial MRT exam
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Reason for partial MRT exam — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Reason for partial MRT exam — Balance (Examination)
BAXRXNDEvidence developing
Reason for not done MRT exam
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- Reason for not done MRT exam — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — Reason for not done MRT exam — Balance (Examination)
BAXTC11Evidence developing
MRT cond. 1, trial 1, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 1, trial 1, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 1, trial 1, time — Balance (Examination)
BAXTC12Evidence developing
MRT cond. 1, trial 2, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 1, trial 2, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 1, trial 2, time — Balance (Examination)
BAXTC21Evidence developing
MRT cond. 2, trial 1, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 2, trial 1, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 2, trial 1, time — Balance (Examination)
BAXTC22Evidence developing
MRT cond. 2, trial 2, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 2, trial 2, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 2, trial 2, time — Balance (Examination)
BAXTC31Evidence developing
MRT cond. 3, trial 1, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 3, trial 1, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 3, trial 1, time — Balance (Examination)
BAXTC32Evidence developing
MRT cond. 3, trial 2, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 3, trial 2, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 3, trial 2, time — Balance (Examination)
BAXTC41Evidence developing
MRT cond. 4, trial 1, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 4, trial 1, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 4, trial 1, time — Balance (Examination)
BAXTC42Evidence developing
MRT cond. 4, trial 2, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 4, trial 2, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 4, trial 2, time — Balance (Examination)
BAXTC51Evidence developing
MRT cond. 5, trial 1, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 5, trial 1, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 5, trial 1, time — Balance (Examination)
BAXTC52Evidence developing
MRT cond. 5, trial 2, time
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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
- MRT cond. 5, trial 2, time — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BAX_L — MRT cond. 5, trial 2, time — Balance (Examination)
BMDBMICCompatible with harmonization
BMI Category - Children/Youth
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- BMI Category - Children/Youth — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — BMI Category - Children/Youth — Body Measures (Examination)
BMDSTATSCompatible with harmonization
Body Measures Component status Code
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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.
Variable names / labels over time
- Body Measures Component status Code — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Body Measures Component status Code — Body Measures (Examination)
BMIARMCCompatible with harmonization
Arm Circumference Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Arm Circumference Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Arm Circumference Comment — Body Measures (Examination)
BMIARMLCompatible with harmonization
Upper Arm Length Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Upper Arm Length Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Upper Arm Length Comment — Body Measures (Examination)
BMIHEADCompatible with harmonization
Head Circumference Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Head Circumference Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Head Circumference Comment — Body Measures (Examination)
BMIHIPCompatible with harmonization
Hip Circumference Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Hip Circumference Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Hip Circumference Comment — Body Measures (Examination)
BMIHTCompatible with harmonization
Standing Height Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Standing Height Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Standing Height Comment — Body Measures (Examination)
BMILEGCompatible with harmonization
Upper Leg Length Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Upper Leg Length Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Upper Leg Length Comment — Body Measures (Examination)
BMIRECUMCompatible with harmonization
Recumbent Length Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Recumbent Length Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Recumbent Length Comment — Body Measures (Examination)
BMIWAISTCompatible with harmonization
Waist Circumference Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Waist Circumference Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Waist Circumference Comment — Body Measures (Examination)
BMIWTCompatible with harmonization
Weight Comment
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Weight Comment — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Weight Comment — Body Measures (Examination)
BMXARMCCompatible with harmonization
Arm Circumference (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Arm Circumference (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Arm Circumference (cm) — Body Measures (Examination)
BMXARMLCompatible with harmonization
Upper Arm Length (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Upper Arm Length (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Upper Arm Length (cm) — Body Measures (Examination)
BMXBMICompatible
Body Mass Index (kg/m**2)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
Qualified Praxis harmonization assessment
Compatible · high confidence
CDC/NCHS documentation supports continuity of the core NHANES anthropometry protocol across Continuous NHANES. BMI remains the derived construct of weight in kilograms divided by standing height in meters squared. Indexed differences for this variable are limited to dataset context and documentation wording, not a confirmed measurement or calculation discontinuity.
Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication
Praxis harmonization actions
- Pool BMI across calibrated cycles without a method adjustment when no substantive variable-level change is present. Continue to apply cycle-appropriate NHANES weights, eligibility restrictions, and ordinary analytic guidance.
Supporting CDC/NCHS evidence
Supporting source-evidence notes
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
- No explicit weight captured
- Units observed
- Not stated / categorical
- Enriched releases
- 12
- 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
- 12
- Flagged method boundaries
- 11
- Assessment status
- Method documentation varies across cycles
- Inference rule
- Documentation differences ≠ confirmed method changes
Method / instrument change points and harmonization actions
- 1999-2000 → 2001-2002: 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 - 2001-2002 → 2003-2004: 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 - 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
- 1999-2000: BMX — Data Collection Methods The data collection methods, examination protocol, and data collection forms are fully documented in the Anthropometry Procedures Manual. Examination Protocol See Item 3 above. In addition, for general guidelines on standard procedures that were followed for the anthropometric measures, refer to the Anthropometric Standardization Reference manual (Lohman, 1988). For specific guidelines, the Anthropometric Procedures Video that demonstrates the NHANES III anthropometric p…
- 2001-2002: BMX_B — The data collection methods, examination protocol, and data collection forms are fully documented in the NHANES Anthropometry Procedures Manual. In addition, for general guidelines on standard procedures that were followed for the anthropometric measures, please refer to the Anthropometric Standardization Reference Manual (Lohman, 1988). The actual measurement techniques used in the survey are illustrated in the NHANES III Anthropometric Procedures Video. The video demonstrates the NHANES III a…
- 2003-2004: BMX_C — The body measurement assessments performed on survey participants varied according to the age of the survey participant. The body measurement protocol used age at the time of the screening interview. In some instances, several weeks elapsed between the initial screening interview and the health examination visit. The Demographics Data File includes an age variable for age at examination (RIDAGEEX). Arm and leg measurements were made on the right side of the body. If an examinee had an amputatio…
- 2005-2006: BMX_D — The body measurement data were collected by trained health technicians. The health technician was accompanied by a recorder during each body measurement examination. The respondent’s age, at the time of the screening interview, determined the body measurement examination protocol for survey participants. In some instances, several weeks elapsed between the initial screening interview and the health examination. The Demographics data file includes variables for age at screening (RIDAGEYR and RID…
- 2007-2008: BMX_E — The body measurement data were collected by trained health technicians. The health technician was assisted by a recorder during the body measurement examination. The respondent’s age at the time of the screening interview determined the body measurement examination protocol for survey participants. In some instances the age at screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables for age at screening (RIDAGEYR …
- 2009-2010: BMX_F — The body measurement data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measurement examination. The respondent’s age at the time of the screening interview determined the body measurement examination protocol for survey participants. In some instances the age at screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes …
- 2011-2012: BMX_G — The body measures data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measures examination. The participant’s age at the time of the screening interview determined the body measures examination protocol. In some instances, the age at the screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables for age in years …
- 2013-2014: BMX_H — The body measures data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measures examination. The participant’s age at the time of the screening interview determined the body measures examination protocol. In some instances, the age at the screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables for age in years …
- 2015-2016: BMX_I — The body measures data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measures examination. The participant’s age at the time of the screening interview determined the body measures examination protocol. In some instances, the age at the screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables for age in years …
- 2017-2018: BMX_J — The body measures data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measures examination. The participant’s age at the time of the screening interview determined the body measures examination protocol. In some instances, the age at the screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables for age in years …
- 2017-2020: P_BMX — The body measures data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measures examination. The participant’s age at the time of the screening interview determined the body measures examination protocol. In some instances, the age at the screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables age in years at s…
- 2021-2023: BMX_L — The body measures data were collected, in the Mobile Examination Center (MEC), by trained health technicians. The health technician was assisted by a recorder during the body measures examination. The participant’s age at the time of the screening interview determined the body measures examination protocol. In some instances, the age at the screening interview and age at the time of the health examination differed by several weeks. The Demographics data file includes variables age in years at s…
Praxis-enriched cycle evidence
- 1999-2000: BMX · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2001-2002: BMX_B · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2003-2004: BMX_C · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2005-2006: BMX_D · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2007-2008: BMX_E · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2009-2010: BMX_F · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2011-2012: BMX_G · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2013-2014: BMX_H · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2015-2016: BMX_I · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2017-2018: BMX_J · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2017-2020: P_BMX · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
- 2021-2023: BMX_L · Target: Both males and females 2 YEARS - 150 YEARS · Method evidence captured
Variable names / labels over time
- Body Mass Index (kg/m**2) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Body Mass Index (kg/m**2) — Body Measures (Examination)
BMXHEADCompatible with harmonization
Head Circumference (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Variable names / labels over time
- Head Circumference (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Head Circumference (cm) — Body Measures (Examination)
BMXHIPCompatible with harmonization
Hip Circumference (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Hip Circumference (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Hip Circumference (cm) — Body Measures (Examination)
BMXHTCompatible
Standing Height (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
Qualified Praxis harmonization assessment
Compatible · high confidence
CDC/NCHS documentation supports continuity of the core NHANES anthropometry protocol across Continuous NHANES. Indexed differences for standing height are limited to dataset context and documentation wording, not a confirmed measurement discontinuity.
Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication
Praxis harmonization actions
- Pool standing height across calibrated cycles without a method adjustment when no substantive variable-level change is present. Preserve age eligibility and relevant measurement comment-code exclusions.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Standing Height (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Standing Height (cm) — Body Measures (Examination)
BMXLEGCompatible with harmonization
Upper Leg Length (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
Variable names / labels over time
- Upper Leg Length (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Upper Leg Length (cm) — Body Measures (Examination)
BMXRECUMCompatible with harmonization
Recumbent Length (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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 · 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
- 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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Variable names / labels over time
- Recumbent Length (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Recumbent Length (cm) — Body Measures (Examination)
BMXWAISTCompatible
Waist Circumference (cm)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
Qualified Praxis harmonization assessment
Compatible · high confidence
CDC/NCHS documentation supports continuity of the core NHANES anthropometry methods across Continuous NHANES, including waist circumference. Indexed differences for this variable are limited to dataset context and documentation wording, not a confirmed waist-measurement discontinuity.
Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication
Praxis harmonization actions
- Pool waist circumference across calibrated cycles without a method adjustment when no substantive variable-level change is present. Preserve age eligibility, comment codes, and cycle-appropriate survey design requirements.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Waist Circumference (cm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Waist Circumference (cm) — Body Measures (Examination)
BMXWTCompatible
Weight (kg)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
Qualified Praxis harmonization assessment
Compatible · high confidence
CDC/NCHS documentation supports continuity of the core NHANES anthropometry protocol across Continuous NHANES. Indexed differences for body weight are limited to dataset context and documentation wording, not a confirmed measurement discontinuity.
Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication
Praxis harmonization actions
- Pool body weight across calibrated cycles without a method adjustment when no substantive variable-level change is present. Review weight comment codes, amputation handling, pregnancy considerations, and cycle-appropriate survey weights.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Weight (kg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BMX_L — Weight (kg) — Body Measures (Examination)
BPAOARMCompatible with harmonization
Arm selected - oscillometric
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Arm selected - oscillometric — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Arm selected - oscillometric — Blood Pressure - Oscillometric Measurements (Examination)
BPAOCSZCompatible with harmonization
Mid arm circumference (cm) cuffing parameters - oscillometric
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Mid arm circumference (cm) cuffing parameters - oscillometric — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Mid arm circumference (cm) cuffing parameters - oscillometric — Blood Pressure - Oscillometric Measurements (Examination)
BPQ020Compatible with harmonization
{Have you/Has SP} ever been told by a doctor or other health professional that {you/s/he} had hypertension, also called high blood pressure?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- {Have you/Has SP} ever been told by a doctor or other health professional that {you/s/he} had hypertension, also called high blood pressure? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPQ_L — {Have you/Has SP} ever been told by a doctor or other health professional that {you/s/he} had hypertension, also called high blood pressure? — Blood Pressure & Cholesterol (Questionnaire)
BPQ030Compatible with harmonization
{Were you/Was SP} told on 2 or more different visits that {you/s/he} had hypertension, also called high blood pressure?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- {Were you/Was SP} told on 2 or more different visits that {you/s/he} had hypertension, also called high blood pressure? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPQ_L — {Were you/Was SP} told on 2 or more different visits that {you/s/he} had hypertension, also called high blood pressure? — Blood Pressure & Cholesterol (Questionnaire)
BPQ080Compatible with harmonization
{Have you/Has SP} ever been told by a doctor or other health professional that {your/his/her} blood cholesterol level was high?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- {Have you/Has SP} ever been told by a doctor or other health professional that {your/his/her} blood cholesterol level was high? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPQ_L — {Have you/Has SP} ever been told by a doctor or other health professional that {your/his/her} blood cholesterol level was high? — Blood Pressure & Cholesterol (Questionnaire)
BPQ101DEvidence developing
{Are you/Is SP} now taking any medication prescribed by a doctor lower {your/his/her/SP's} blood cholesterol?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- {Are you/Is SP} now taking any medication prescribed by a doctor lower {your/his/her/SP's} blood cholesterol? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPQ_L — {Are you/Is SP} now taking any medication prescribed by a doctor lower {your/his/her/SP's} blood cholesterol? — Blood Pressure & Cholesterol (Questionnaire)
BPQ150Evidence developing
{Are you/Is SP} now taking any medication prescribed by a doctor for {your/his/her/SP's} high blood pressure?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- {Are you/Is SP} now taking any medication prescribed by a doctor for {your/his/her/SP's} high blood pressure? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPQ_L — {Are you/Is SP} now taking any medication prescribed by a doctor for {your/his/her/SP's} high blood pressure? — Blood Pressure & Cholesterol (Questionnaire)
BPXODI1Compatible with harmonization
Diastolic - 1st oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Diastolic - 1st oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Diastolic - 1st oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXODI2Compatible with harmonization
Diastolic - 2nd oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Diastolic - 2nd oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Diastolic - 2nd oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXODI3Compatible with harmonization
Diastolic - 3rd oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Diastolic - 3rd oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Diastolic - 3rd oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXOPLS1Compatible with harmonization
Pulse - 1st oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Pulse - 1st oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Pulse - 1st oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXOPLS2Compatible with harmonization
Pulse - 2nd oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Pulse - 2nd oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Pulse - 2nd oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXOPLS3Compatible with harmonization
Pulse - 3rd oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Pulse - 3rd oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Pulse - 3rd oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXOSY1Compatible with harmonization
Systolic - 1st oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Supporting source-evidence notes
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
- No explicit weight captured
- Units observed
- Not stated / categorical
- Enriched releases
- 3
- 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
- 3
- Flagged method boundaries
- 2
- Assessment status
- Method documentation varies across cycles
- Inference rule
- Documentation differences ≠ confirmed method changes
Method / instrument change points and harmonization actions
- 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
- 2017-2018: BPXO_J — All BP measurements (systolic and diastolic) are taken in the mobile examination center (MEC). Prior to obtaining BP measurements, upper arm circumference is measured, which is done to guide selection of cuff size. Details on the protocol for obtaining upper arm circumference is described in the Anthropometry Procedures Manual. After resting quietly in a seated position for 5 minutes; three consecutive BP measurements (systolic and diastolic) were taken 60 seconds apart using a digital upper-ar…
- 2017-2020: P_BPXO — All BP measurements are taken in the mobile examination center (MEC). Prior to obtaining BP measurements, upper arm circumference is measured, which is done to guide selection of cuff size. Details on the protocol for obtaining upper arm circumference is described in the Anthropometry Procedures Manual. After resting quietly in a seated position for 5 minutes; three consecutive BP measurements were taken 60 seconds apart using a digital upper-arm electronic measurement device, Omron HEM–907XL. …
- 2021-2023: BPXO_L — All BP measurements are taken in the mobile examination center (MEC). Prior to obtaining BP measurements, upper arm circumference is measured, which is done to guide selection of cuff size. After resting quietly in a seated position for 5 minutes, three consecutive BP measurements (systolic and diastolic) were taken 60 seconds apart using a digital upper-arm electronic blood pressure measurement device, Omron HEM–907XL. This device has been previously validated by both the Association for the A…
Praxis-enriched cycle evidence
- 2017-2018: BPXO_J · Target: Both males and females 8 YEARS - 150 YEARS · Method evidence captured
- 2017-2020: P_BPXO · Target: Both males and females 8 YEARS - 150 YEARS · Method evidence captured
- 2021-2023: BPXO_L · Target: Both males and females 8 YEARS - 150 YEARS · Method evidence captured
Variable names / labels over time
- Systolic - 1st oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Systolic - 1st oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXOSY2Compatible with harmonization
Systolic - 2nd oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Systolic - 2nd oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Systolic - 2nd oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
BPXOSY3Compatible with harmonization
Systolic - 3rd oscillometric reading
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Examination
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Systolic - 3rd oscillometric reading — 2021-2023
Cycle-by-cycle release history
- 2021-2023: BPXO_L — Systolic - 3rd oscillometric reading — Blood Pressure - Oscillometric Measurements (Examination)
DBD030Compatible with harmonization
How old was {SP} when {he/she} completely stopped breastfeeding or being fed breastmilk?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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
- 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Variable names / labels over time
- How old was {SP} when {he/she} completely stopped breastfeeding or being fed breastmilk? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — How old was {SP} when {he/she} completely stopped breastfeeding or being fed breastmilk? — Diet Behavior & Nutrition (Questionnaire)
DBD041Compatible with harmonization
How old was {SP} when {he/she} was first fed formula?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- How old was {SP} when {he/she} was first fed formula? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — How old was {SP} when {he/she} was first fed formula? — Diet Behavior & Nutrition (Questionnaire)
DBD050Compatible with harmonization
How old was {SP} when {he/she} completely stopped drinking formula?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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
- 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Variable names / labels over time
- How old was {SP} when {he/she} completely stopped drinking formula? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — How old was {SP} when {he/she} completely stopped drinking formula? — Diet Behavior & Nutrition (Questionnaire)
DBD055Compatible with harmonization
This next question is about the first thing that {SP} was given other than breast milk or formula. Please include juice, cow's milk, sugar water, baby food, or anything else that {SP} might have been given, even water. How old was {SP} when {he/she} was first fed anything other than breast milk or formula? (Days)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- This next question is about the first thing that {SP} was given other than breast milk or formula. Please include juice, cow's milk, sugar water, baby food, or anything else that {SP} might have been given, even water. How old was {SP} when {he/she} was first fed anything other than breast milk or formula? (Days) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — This next question is about the first thing that {SP} was given other than breast milk or formula. Please include juice, cow's milk, sugar water, baby food, or anything else that {SP} might have been given, even water. How old was {SP} when {he/she} was first fed anything other than breast milk or formula? (Days) — Diet Behavior & Nutrition (Questionnaire)
DBD061Compatible with harmonization
How old was {SP} when {he/she} was first fed milk?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- How old was {SP} when {he/she} was first fed milk? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — How old was {SP} when {he/she} was first fed milk? — Diet Behavior & Nutrition (Questionnaire)
DBD100Compatible with harmonization
How often {do you/does SP} add this salt to {your/his/her/SP's} food at the table? Would you say . . .
- Observed years
- 2021–2023
- 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: 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 this salt to {your/his/her/SP's} food at the table? Would you say . . . — 2021-2023
Cycle-by-cycle release history
- 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)
DBD381Compatible with harmonization
During the school year, about how many times a week {do you/does SP} usually get a complete school lunch?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- 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.
Variable names / labels over time
- During the school year, about how many times a week {do you/does SP} usually get a complete school lunch? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — During the school year, about how many times a week {do you/does SP} usually get a complete school lunch? — Diet Behavior & Nutrition (Questionnaire)
DBD411Compatible with harmonization
During the school year, about how many times a week {do you/does SP} usually get a complete breakfast at school?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- 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.
- 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
- During the school year, about how many times a week {do you/does SP} usually get a complete breakfast at school? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — During the school year, about how many times a week {do you/does SP} usually get a complete breakfast at school? — Diet Behavior & Nutrition (Questionnaire)
DBQ010Compatible with harmonization
Now I'm going to ask you some general questions about {SP's} eating habits. Was {SP} ever breastfed or fed breastmilk?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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
- 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.
Variable names / labels over time
- Now I'm going to ask you some general questions about {SP's} eating habits. Was {SP} ever breastfed or fed breastmilk? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — Now I'm going to ask you some general questions about {SP's} eating habits. Was {SP} ever breastfed or fed breastmilk? — Diet Behavior & Nutrition (Questionnaire)
DBQ073ACompatible with harmonization
What type of milk was {SP} first fed? Was it . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of milk was {SP} first fed? Was it . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — What type of milk was {SP} first fed? Was it . . . — Diet Behavior & Nutrition (Questionnaire)
DBQ073BCompatible with harmonization
What type of milk was {SP} first fed? Was it . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of milk was {SP} first fed? Was it . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — What type of milk was {SP} first fed? Was it . . . — Diet Behavior & Nutrition (Questionnaire)
DBQ073CCompatible with harmonization
What type of milk was {SP} first fed? Was it . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of milk was {SP} first fed? Was it . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — What type of milk was {SP} first fed? Was it . . . — Diet Behavior & Nutrition (Questionnaire)
DBQ073DCompatible with harmonization
What type of milk was {SP} first fed? Was it . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of milk was {SP} first fed? Was it . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — What type of milk was {SP} first fed? Was it . . . — Diet Behavior & Nutrition (Questionnaire)
DBQ073ECompatible with harmonization
What type of milk was {SP} first fed? Was it . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of milk was {SP} first fed? Was it . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — What type of milk was {SP} first fed? Was it . . . — Diet Behavior & Nutrition (Questionnaire)
DBQ073UCompatible with harmonization
What type of milk was {SP} first fed? Was it . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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: 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What type of milk was {SP} first fed? Was it . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — What type of milk was {SP} first fed? Was it . . . — Diet Behavior & Nutrition (Questionnaire)
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
- 2021–2023
- 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: 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 . . . — 2021-2023
Cycle-by-cycle release history
- 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)
DBQ301Compatible with harmonization
The next questions are about meals provided by community or government programs. In the past 12 months, did {you/SP} receive any meals delivered to {your/his/her} home from community programs, "Meals on Wheels", or any other programs?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Variable names / labels over time
- The next questions are about meals provided by community or government programs. In the past 12 months, did {you/SP} receive any meals delivered to {your/his/her} home from community programs, "Meals on Wheels", or any other programs? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — The next questions are about meals provided by community or government programs. In the past 12 months, did {you/SP} receive any meals delivered to {your/his/her} home from community programs, "Meals on Wheels", or any other programs? — Diet Behavior & Nutrition (Questionnaire)
DBQ330Compatible with harmonization
In the past 12 months, did {you/SP} go to a community program or senior center to eat prepared meals?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- In the past 12 months, did {you/SP} go to a community program or senior center to eat prepared meals? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — In the past 12 months, did {you/SP} go to a community program or senior center to eat prepared meals? — Diet Behavior & Nutrition (Questionnaire)
DBQ360Compatible with harmonization
During the school year, {do you/does SP} attend a kindergarten, grade school, junior or high school?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- 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.
Variable names / labels over time
- During the school year, {do you/does SP} attend a kindergarten, grade school, junior or high school? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — During the school year, {do you/does SP} attend a kindergarten, grade school, junior or high school? — Diet Behavior & Nutrition (Questionnaire)
DBQ370Compatible with harmonization
Does {your/SP's} school serve school lunches? These are complete lunches that cost the same every day.
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- 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.
Variable names / labels over time
- Does {your/SP's} school serve school lunches? These are complete lunches that cost the same every day. — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — Does {your/SP's} school serve school lunches? These are complete lunches that cost the same every day. — Diet Behavior & Nutrition (Questionnaire)
DBQ390Compatible with harmonization
{Do you/Does SP} get these lunches free, at a reduced price, or {do you/does he/she} pay full price?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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
- 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.
Variable names / labels over time
- {Do you/Does SP} get these lunches free, at a reduced price, or {do you/does he/she} pay full price? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — {Do you/Does SP} get these lunches free, at a reduced price, or {do you/does he/she} pay full price? — Diet Behavior & Nutrition (Questionnaire)
DBQ400Compatible with harmonization
Does {your/SP's} school serve a complete breakfast that costs the same every day?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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
- 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.
Variable names / labels over time
- Does {your/SP's} school serve a complete breakfast that costs the same every day? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — Does {your/SP's} school serve a complete breakfast that costs the same every day? — Diet Behavior & Nutrition (Questionnaire)
DBQ421Compatible with harmonization
{Do you/Does SP} get these breakfasts free, at a reduced price, or {do you/does he/she} pay full price?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Variable names / labels over time
- {Do you/Does SP} get these breakfasts free, at a reduced price, or {do you/does he/she} pay full price? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — {Do you/Does SP} get these breakfasts free, at a reduced price, or {do you/does he/she} pay full price? — Diet Behavior & Nutrition (Questionnaire)
DBQ424Compatible with harmonization
(Do you/Does SP) get a free or reduced price meal at any summer program (he/she) attends?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Variable names / labels over time
- (Do you/Does SP) get a free or reduced price meal at any summer program (he/she) attends? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — (Do you/Does SP) get a free or reduced price meal at any summer program (he/she) attends? — Diet Behavior & Nutrition (Questionnaire)
DBQ930Compatible with harmonization
{Are you/Is SP} the person who does most of the planning or preparing of meals in {your/SP's} family?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Are you/Is SP} the person who does most of the planning or preparing of meals in {your/SP's} family? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — {Are you/Is SP} the person who does most of the planning or preparing of meals in {your/SP's} family? — Diet Behavior & Nutrition (Questionnaire)
DBQ935Compatible with harmonization
{Do you/Does SP} share in the planning or preparing of meals with someone else?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Do you/Does SP} share in the planning or preparing of meals with someone else? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — {Do you/Does SP} share in the planning or preparing of meals with someone else? — Diet Behavior & Nutrition (Questionnaire)
DBQ940Compatible with harmonization
{Are you/Is SP} the person who does most of the shopping for food in {your/SP's} family?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Are you/Is SP} the person who does most of the shopping for food in {your/SP's} family? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — {Are you/Is SP} the person who does most of the shopping for food in {your/SP's} family? — Diet Behavior & Nutrition (Questionnaire)
DBQ945Compatible with harmonization
{Do you/Does SP} share in the shopping for food with someone else?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 → 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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Do you/Does SP} share in the shopping for food with someone else? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DBQ_L — {Do you/Does SP} share in the shopping for food with someone else? — Diet Behavior & Nutrition (Questionnaire)
DEQ034ACompatible with harmonization
When {you go/SP goes} outside on a very sunny day, for more than one hour, how often {do you/does SP} Stay in the shade?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Variable names / labels over time
- When {you go/SP goes} outside on a very sunny day, for more than one hour, how often {do you/does SP} Stay in the shade? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEQ_L — When {you go/SP goes} outside on a very sunny day, for more than one hour, how often {do you/does SP} Stay in the shade? — Dermatology (Questionnaire)
DEQ034CCompatible with harmonization
Wear a long sleeved shirt? Would you say . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Variable names / labels over time
- Wear a long sleeved shirt? Would you say . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEQ_L — Wear a long sleeved shirt? Would you say . . . — Dermatology (Questionnaire)
DEQ034DCompatible with harmonization
Use sunscreen? Would you say . . .
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Variable names / labels over time
- Use sunscreen? Would you say . . . — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEQ_L — Use sunscreen? Would you say . . . — Dermatology (Questionnaire)
DID040Compatible with harmonization
How old {was SP/were you} when a doctor or other health professional first told {you/him/her} that {you/he/she} had diabetes or sugar diabetes?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- How old {was SP/were you} when a doctor or other health professional first told {you/him/her} that {you/he/she} had diabetes or sugar diabetes? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — How old {was SP/were you} when a doctor or other health professional first told {you/him/her} that {you/he/she} had diabetes or sugar diabetes? — Diabetes (Questionnaire)
DID060Compatible with harmonization
For how long {have you/has SP} been taking insulin?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- For how long {have you/has SP} been taking insulin? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — For how long {have you/has SP} been taking insulin? — Diabetes (Questionnaire)
DIQ010Compatible with harmonization
The next questions are about specific medical conditions. {Other than during pregnancy, {have you/has SP}/{Have you/Has SP}} ever been told by a doctor or health professional that {you have/{he/she/SP} has} diabetes or sugar diabetes?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- The next questions are about specific medical conditions. {Other than during pregnancy, {have you/has SP}/{Have you/Has SP}} ever been told by a doctor or health professional that {you have/{he/she/SP} has} diabetes or sugar diabetes? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — The next questions are about specific medical conditions. {Other than during pregnancy, {have you/has SP}/{Have you/Has SP}} ever been told by a doctor or health professional that {you have/{he/she/SP} has} diabetes or sugar diabetes? — Diabetes (Questionnaire)
DIQ050Compatible with harmonization
{Is SP/Are you} now taking insulin
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- {Is SP/Are you} now taking insulin — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — {Is SP/Are you} now taking insulin — Diabetes (Questionnaire)
DIQ060UCompatible with harmonization
UNIT OF MEASURE
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 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.
Variable names / labels over time
- UNIT OF MEASURE — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — UNIT OF MEASURE — Diabetes (Questionnaire)
DIQ070Compatible with harmonization
{Is SP/Are you} now taking diabetic pills to lower {{his/her}/your} blood sugar? These are sometimes called oral agents or oral hypoglycemic agents.
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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 · 2001-2002 → 2003-2004 · 2003-2004 → 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.
Variable names / labels over time
- {Is SP/Are you} now taking diabetic pills to lower {{his/her}/your} blood sugar? These are sometimes called oral agents or oral hypoglycemic agents. — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — {Is SP/Are you} now taking diabetic pills to lower {{his/her}/your} blood sugar? These are sometimes called oral agents or oral hypoglycemic agents. — Diabetes (Questionnaire)
DIQ160Compatible with harmonization
{Have you/Has SP} ever been told by a doctor or other health professional that {you have/SP has} any of the following: prediabetes, impaired fasting glucose, impaired glucose tolerance, borderline diabetes or that {your/her/his} blood sugar is higher than normal but not high enough to be called diabetes or sugar diabetes?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Have you/Has SP} ever been told by a doctor or other health professional that {you have/SP has} any of the following: prediabetes, impaired fasting glucose, impaired glucose tolerance, borderline diabetes or that {your/her/his} blood sugar is higher than normal but not high enough to be called diabetes or sugar diabetes? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — {Have you/Has SP} ever been told by a doctor or other health professional that {you have/SP has} any of the following: prediabetes, impaired fasting glucose, impaired glucose tolerance, borderline diabetes or that {your/her/his} blood sugar is higher than normal but not high enough to be called diabetes or sugar diabetes? — Diabetes (Questionnaire)
DIQ180Compatible with harmonization
{Have you/Has SP} had a blood test for high blood sugar or diabetes within the past three years?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Questionnaire
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Have you/Has SP} had a blood test for high blood sugar or diabetes within the past three years? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DIQ_L — {Have you/Has SP} had a blood test for high blood sugar or diabetes within the past three years? — Diabetes (Questionnaire)
DMDBORN4Compatible with harmonization
Country of birth
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 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.
- 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
- Country of birth — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — Country of birth — Demographic Variables and Sample Weights (Demographics)
DMDEDUC2Compatible with harmonization
What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received?
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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 · 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
- 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Variable names / labels over time
- What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? — Demographic Variables and Sample Weights (Demographics)
DMDHHSIZCompatible with harmonization
Total number of people in the Household
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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 · 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 → 2021-2023
Praxis harmonization actions
- 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.
Variable names / labels over time
- Total number of people in the Household — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — Total number of people in the Household — Demographic Variables and Sample Weights (Demographics)
DMDHRAGZCompatible with harmonization
HH ref person’s age in years
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 2017-2018 → 2021-2023
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- HH ref person’s age in years — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — HH ref person’s age in years — Demographic Variables and Sample Weights (Demographics)
DMDHREDZCompatible with harmonization
HH ref person’s education level
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 2017-2018 → 2021-2023
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- HH ref person’s education level — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — HH ref person’s education level — Demographic Variables and Sample Weights (Demographics)
DMDHRGNDCompatible with harmonization
HH ref person’s gender
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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 · 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 → 2021-2023
Praxis harmonization actions
- 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.
- 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.
Variable names / labels over time
- HH ref person’s gender — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — HH ref person’s gender — Demographic Variables and Sample Weights (Demographics)
DMDHRMAZCompatible with harmonization
HH ref person’s marital status
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 2017-2018 → 2021-2023
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- HH ref person’s marital status — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — HH ref person’s marital status — Demographic Variables and Sample Weights (Demographics)
DMDHSEDZCompatible with harmonization
HH ref person’s spouse’s education level
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 2017-2018 → 2021-2023
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.
Supporting CDC/NCHS evidence
Variable names / labels over time
- HH ref person’s spouse’s education level — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — HH ref person’s spouse’s education level — Demographic Variables and Sample Weights (Demographics)
DMDMARTZCompatible with harmonization
Marital status
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 2017-2020 → 2021-2023
Praxis harmonization actions
- 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
- Marital status — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — Marital status — Demographic Variables and Sample Weights (Demographics)
DMDYRUSREvidence developing
Length of time the participant has been in the US.
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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
- Length of time the participant has been in the US. — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — Length of time the participant has been in the US. — Demographic Variables and Sample Weights (Demographics)
DMQMILIZCompatible with harmonization
{Have you/Has SP} ever served on active duty in the U.S. Armed Forces, military Reserves, or National Guard? (Active duty does not include training for the Reserves or National Guard, but does include activation, for service in the U.S. or in a foreign country, in support of military or humanitarian operations.)
- Observed years
- 2021–2023
- Release records
- 1
- Datasets
- 1
- Components
- Demographics
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: 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
Supporting CDC/NCHS evidence
Variable names / labels over time
- {Have you/Has SP} ever served on active duty in the U.S. Armed Forces, military Reserves, or National Guard? (Active duty does not include training for the Reserves or National Guard, but does include activation, for service in the U.S. or in a foreign country, in support of military or humanitarian operations.) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DEMO_L — {Have you/Has SP} ever served on active duty in the U.S. Armed Forces, military Reserves, or National Guard? (Active duty does not include training for the Reserves or National Guard, but does include activation, for service in the U.S. or in a foreign country, in support of military or humanitarian operations.) — Demographic Variables and Sample Weights (Demographics)
DPQ010Compatible with harmonization
Over the last 2 weeks, how often have you been bothered by the following problems: little interest or pleasure in doing things? Would you say...
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
- 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
- Over the last 2 weeks, how often have you been bothered by the following problems: little interest or pleasure in doing things? Would you say... — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — Over the last 2 weeks, how often have you been bothered by the following problems: little interest or pleasure in doing things? Would you say... — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — Over the last 2 weeks, how often have you been bothered by the following problems: little interest or pleasure in doing things? Would you say... — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ020Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] feeling down, depressed, or hopeless?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
Supporting source-evidence notes
CDC/NCHS notes mention these survey or subsample weight variables across the indexed releases: WTMEC2YR. Do not apply them together; choose the cycle- and subsample-appropriate weight for the releases included in the analysis. Eligibility/target wording changes across releases; apply cycle-specific eligibility before pooling.
These notes summarize indexed evidence and method-text signals. They do not supersede the qualified harmonization assessment above.
- Documented weight variables
- WTMEC2YR
- Units observed
- Not stated / categorical
- Enriched releases
- 18
- Method-change status
- no method evidence
Method-change assessment
No method evidence captured
No method text was captured for this variable in the current enrichment set. Do not infer method stability from absence of documentation.
- Releases with method evidence
- 0
- Flagged method boundaries
- 0
- Assessment status
- No method evidence captured
- Inference rule
- Documentation differences ≠ confirmed method changes
Praxis-enriched cycle evidence
- 2005-2006: DPQYTH_D · Target: Both males and females 12 YEARS - 17 YEARS
- 2005-2006: DPQ_D · Target: Both males and females 18 YEARS - 150 YEARS
- 2007-2008: DPQYTH_E · Target: Both males and females 12 YEARS - 17 YEARS
- 2007-2008: DPQ_E · Target: Both males and females 18 YEARS - 150 YEARS
- 2009-2010: DPQY_F_R · Target: Both males and females 12 YEARS - 17 YEARS
- 2009-2010: DPQ_F · Target: Both males and females 18 YEARS - 150 YEARS
- 2011-2012: DPQY_G_R · Target: Both males and females 12 YEARS - 17 YEARS · Weight evidence: WTMEC2YR
- 2011-2012: DPQ_G · Target: Both males and females 18 YEARS - 150 YEARS · Weight evidence: WTMEC2YR
- 2013-2014: DPQY_H_R · Target: Both males and females 12 YEARS - 17 YEARS · Weight evidence: WTMEC2YR
- 2013-2014: DPQ_H · Target: Both males and females 18 YEARS - 150 YEARS · Weight evidence: WTMEC2YR
- 2015-2016: DPQY_I_R · Target: Both males and females 12 YEARS - 17 YEARS · Weight evidence: WTMEC2YR
- 2015-2016: DPQ_I · Target: Both males and females 18 YEARS - 150 YEARS · Weight evidence: WTMEC2YR
- 2017-2018: DPQY_J_R · Target: Both males and females 12 YEARS - 17 YEARS
- 2017-2018: DPQ_J · Target: Both males and females 18 YEARS - 150 YEARS · Weight evidence: WTMEC2YR
- 2017-2020: P_DPQ · Target: Both males and females 18 YEARS - 150 YEARS
- 2017-2020: P_DPQY_R · Target: Both males and females 12 YEARS - 17 YEARS
- 2021-2023: DPQY_L_R · Target: Both males and females 12 YEARS - 17 YEARS
- 2021-2023: DPQ_L · Target: Both males and females 18 YEARS - 150 YEARS
Variable names / labels over time
- [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling down, depressed, or hopeless? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling down, depressed, or hopeless? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling down, depressed, or hopeless? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ030Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] trouble falling or staying asleep, or sleeping too much?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
- [Over the last 2 weeks, how often have you been bothered by the following problems:] trouble falling or staying asleep, or sleeping too much? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] trouble falling or staying asleep, or sleeping too much? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] trouble falling or staying asleep, or sleeping too much? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ040Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] feeling tired or having little energy?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
- [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling tired or having little energy? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling tired or having little energy? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling tired or having little energy? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ050Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] poor appetite or overeating?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
- [Over the last 2 weeks, how often have you been bothered by the following problems:] poor appetite or overeating? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] poor appetite or overeating? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] poor appetite or overeating? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ060Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] feeling bad about yourself - or that you are a failure or have let yourself or your family down?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
- [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling bad about yourself - or that you are a failure or have let yourself or your family down? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling bad about yourself - or that you are a failure or have let yourself or your family down? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] feeling bad about yourself - or that you are a failure or have let yourself or your family down? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ070Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] trouble concentrating on things, such as reading the newspaper or watching TV?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
- [Over the last 2 weeks, how often have you been bothered by the following problems:] trouble concentrating on things, such as reading the newspaper or watching TV? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] trouble concentrating on things, such as reading the newspaper or watching TV? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] trouble concentrating on things, such as reading the newspaper or watching TV? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ080Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] moving or speaking so slowly that other people could have noticed? Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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
- [Over the last 2 weeks, how often have you been bothered by the following problems:] moving or speaking so slowly that other people could have noticed? Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] moving or speaking so slowly that other people could have noticed? Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] moving or speaking so slowly that other people could have noticed? Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ090Compatible with harmonization
[Over the last 2 weeks, how often have you been bothered by the following problems:] Thoughts that you would be better off dead or of hurting yourself in some way?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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.
- 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.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- [Over the last 2 weeks, how often have you been bothered by the following problems:] Thoughts that you would be better off dead or of hurting yourself in some way? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — [Over the last 2 weeks, how often have you been bothered by the following problems:] Thoughts that you would be better off dead or of hurting yourself in some way? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — [Over the last 2 weeks, how often have you been bothered by the following problems:] Thoughts that you would be better off dead or of hurting yourself in some way? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DPQ100Multiple dataset contexts
How difficult have these problems made it for you to do your work, take care of things at home, or get along with people?
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- Components
- Questionnaire
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
- How difficult have these problems made it for you to do your work, take care of things at home, or get along with people? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DPQ_L — How difficult have these problems made it for you to do your work, take care of things at home, or get along with people? — Mental Health - Depression Screener (Questionnaire)
- 2021-2023: DPQY_L_R — How difficult have these problems made it for you to do your work, take care of things at home, or get along with people? — Mental Health - Depression Screener - Youth (Questionnaire) — Note: RDC Only
DR1_020Indexed code and label stable
What time did you begin to eat/drink the meal/food?
- Observed years
- 2021–2023
- 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
- What time did you begin to eat/drink the meal/food? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — What time did you begin to eat/drink the meal/food? — Dietary Interview - Individual Foods, First Day (Dietary)
DR1_030ZIndexed code and label stable
Name of eating occasion
- Observed years
- 2021–2023
- 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
- Name of eating occasion — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Name of eating occasion — Dietary Interview - Individual Foods, First Day (Dietary)
DR1_040ZIndexed code and label stable
Did you eat this meal at home?
- Observed years
- 2021–2023
- 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
- Did you eat this meal at home? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Did you eat this meal at home? — Dietary Interview - Individual Foods, First Day (Dietary)
DR1_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
- 2021–2023
- 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
- Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual? — 2021-2023
Cycle-by-cycle release history
- 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_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
- 2021–2023
- 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. — 2021-2023
Cycle-by-cycle release history
- 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_330ZIndexed code and label stable
Total tap water drank yesterday - including filtered tap water and water from a drinking fountain.
- Observed years
- 2021–2023
- 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. — 2021-2023
Cycle-by-cycle release history
- 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)
DR1BWATZIndexed code and label stable
Total bottled water drank yesterday (gm)
- Observed years
- 2021–2023
- 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) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1TOT_L — Total bottled water drank yesterday (gm) — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1CCMNMIndexed code and label stable
Combination food number (sequential number)
- Observed years
- 2021–2023
- 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
- Combination food number (sequential number) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Combination food number (sequential number) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1CCMTXIndexed code and label stable
Combination food type
- Observed years
- 2021–2023
- 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
- Combination food type — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Combination food type — Dietary Interview - Individual Foods, First Day (Dietary)
DR1DAYMultiple dataset contexts
Intake day of the week
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- 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 — 2021-2023
Cycle-by-cycle release history
- 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)
DR1DBIHMultiple dataset contexts
Number of days between intake day and the day of family questionnaire administered in the household.
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- 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. — 2021-2023
Cycle-by-cycle release history
- 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)
DR1DRSTZMultiple dataset contexts
Dietary recall status
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- 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 — 2021-2023
Cycle-by-cycle release history
- 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)
DR1EXMERMultiple dataset contexts
Interviewer ID code
- Observed years
- 2021–2023
- Release records
- 2
- Datasets
- 2
- 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 — 2021-2023
Cycle-by-cycle release history
- 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)
DR1FSIndexed code and label stable
Where did you get (this/most of the ingredients for this) {FOODNAME}?
- Observed years
- 2021–2023
- 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
- Where did you get (this/most of the ingredients for this) {FOODNAME}? — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Where did you get (this/most of the ingredients for this) {FOODNAME}? — Dietary Interview - Individual Foods, First Day (Dietary)
DR1HELPIndexed code and label stable
Who helped in responding for this interview
- Observed years
- 2021–2023
- 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
- Who helped in responding for this interview — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1TOT_L — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1IACARIndexed code and label stable
Alpha-carotene (mcg)
- Observed years
- 2021–2023
- 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
- Alpha-carotene (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Alpha-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IALCOIndexed code and label stable
Alcohol (gm)
- Observed years
- 2021–2023
- 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
- Alcohol (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Alcohol (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IATOAIndexed code and label stable
Added alpha-tocopherol (Vitamin E) (mg)
- Observed years
- 2021–2023
- 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
- Added alpha-tocopherol (Vitamin E) (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Added alpha-tocopherol (Vitamin E) (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IATOCIndexed code and label stable
Vitamin E as alpha-tocopherol (mg)
- Observed years
- 2021–2023
- 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
- Vitamin E as alpha-tocopherol (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Vitamin E as alpha-tocopherol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IB12AIndexed code and label stable
Added vitamin B12 (mcg)
- Observed years
- 2021–2023
- 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
- Added vitamin B12 (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Added vitamin B12 (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IBCARIndexed code and label stable
Beta-carotene (mcg)
- Observed years
- 2021–2023
- 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
- Beta-carotene (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Beta-carotene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICAFFIndexed code and label stable
Caffeine (mg)
- Observed years
- 2021–2023
- 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
- Caffeine (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Caffeine (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICALCIndexed code and label stable
Calcium (mg)
- Observed years
- 2021–2023
- 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
- Calcium (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Calcium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICARBIndexed code and label stable
Carbohydrate (gm)
- Observed years
- 2021–2023
- 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
- Carbohydrate (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Carbohydrate (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICHLIndexed code and label stable
Total choline (mg)
- Observed years
- 2021–2023
- 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 choline (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Total choline (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICHOLIndexed code and label stable
Cholesterol (mg)
- Observed years
- 2021–2023
- 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
- Cholesterol (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Cholesterol (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICOPPIndexed code and label stable
Copper (mg)
- Observed years
- 2021–2023
- 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
- Copper (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Copper (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ICRYPIndexed code and label stable
Beta-cryptoxanthin (mcg)
- Observed years
- 2021–2023
- 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
- Beta-cryptoxanthin (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Beta-cryptoxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFAIndexed code and label stable
Folic acid (mcg)
- Observed years
- 2021–2023
- 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
- Folic acid (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Folic acid (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFDCDIndexed code and label stable
USDA food code
- Observed years
- 2021–2023
- 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
- USDA food code — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — USDA food code — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFDFEIndexed code and label stable
Folate as dietary folate equivalents (mcg)
- Observed years
- 2021–2023
- 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
- Folate as dietary folate equivalents (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Folate as dietary folate equivalents (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFFIndexed code and label stable
Food folate (mcg)
- Observed years
- 2021–2023
- 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
- Food folate (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Food folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFIBEIndexed code and label stable
Dietary fiber (gm)
- Observed years
- 2021–2023
- 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
- Dietary fiber (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Dietary fiber (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IFOLAIndexed code and label stable
Total folate (mcg)
- Observed years
- 2021–2023
- 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 folate (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Total folate (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IGRMSIndexed code and label stable
Gram weight of the food/individual component
- Observed years
- 2021–2023
- 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
- Gram weight of the food/individual component — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Gram weight of the food/individual component — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IIRONIndexed code and label stable
Iron (mg)
- Observed years
- 2021–2023
- 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
- Iron (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Iron (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IKCALIndexed code and label stable
Energy (kcal)
- Observed years
- 2021–2023
- 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
- Energy (kcal) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Energy (kcal) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ILINEIndexed code and label stable
Food/Individual component number
- Observed years
- 2021–2023
- 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
- Food/Individual component number — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Food/Individual component number — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ILYCOIndexed code and label stable
Lycopene (mcg)
- Observed years
- 2021–2023
- 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
- Lycopene (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Lycopene (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1ILZIndexed code and label stable
Lutein + zeaxanthin (mcg)
- Observed years
- 2021–2023
- 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
- Lutein + zeaxanthin (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Lutein + zeaxanthin (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM161Indexed code and label stable
MFA 16:1 (Hexadecenoic) (gm)
- Observed years
- 2021–2023
- 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
- MFA 16:1 (Hexadecenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — MFA 16:1 (Hexadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM181Indexed code and label stable
MFA 18:1 (Octadecenoic) (gm)
- Observed years
- 2021–2023
- 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
- MFA 18:1 (Octadecenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — MFA 18:1 (Octadecenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM201Indexed code and label stable
MFA 20:1 (Eicosenoic) (gm)
- Observed years
- 2021–2023
- 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
- MFA 20:1 (Eicosenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — MFA 20:1 (Eicosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IM221Indexed code and label stable
MFA 22:1 (Docosenoic) (gm)
- Observed years
- 2021–2023
- 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
- MFA 22:1 (Docosenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — MFA 22:1 (Docosenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IMAGNIndexed code and label stable
Magnesium (mg)
- Observed years
- 2021–2023
- 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
- Magnesium (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Magnesium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IMFATIndexed code and label stable
Total monounsaturated fatty acids (gm)
- Observed years
- 2021–2023
- 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 monounsaturated fatty acids (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Total monounsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IMOISIndexed code and label stable
Moisture (gm)
- Observed years
- 2021–2023
- 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
- Moisture (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Moisture (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1INIACIndexed code and label stable
Niacin (mg)
- Observed years
- 2021–2023
- 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
- Niacin (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Niacin (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP182Indexed code and label stable
PFA 18:2 (Octadecadienoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 18:2 (Octadecadienoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 18:2 (Octadecadienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP183Indexed code and label stable
PFA 18:3 (Octadecatrienoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 18:3 (Octadecatrienoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 18:3 (Octadecatrienoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP184Indexed code and label stable
PFA 18:4 (Octadecatetraenoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 18:4 (Octadecatetraenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 18:4 (Octadecatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP204Indexed code and label stable
PFA 20:4 (Eicosatetraenoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 20:4 (Eicosatetraenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 20:4 (Eicosatetraenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP205Indexed code and label stable
PFA 20:5 (Eicosapentaenoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 20:5 (Eicosapentaenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 20:5 (Eicosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP225Indexed code and label stable
PFA 22:5 (Docosapentaenoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 22:5 (Docosapentaenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 22:5 (Docosapentaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IP226Indexed code and label stable
PFA 22:6 (Docosahexaenoic) (gm)
- Observed years
- 2021–2023
- 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
- PFA 22:6 (Docosahexaenoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — PFA 22:6 (Docosahexaenoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPFATIndexed code and label stable
Total polyunsaturated fatty acids (gm)
- Observed years
- 2021–2023
- 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 polyunsaturated fatty acids (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Total polyunsaturated fatty acids (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPHOSIndexed code and label stable
Phosphorus (mg)
- Observed years
- 2021–2023
- 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
- Phosphorus (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Phosphorus (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPOTAIndexed code and label stable
Potassium (mg)
- Observed years
- 2021–2023
- 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
- Potassium (mg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Potassium (mg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IPROTIndexed code and label stable
Protein (gm)
- Observed years
- 2021–2023
- 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
- Protein (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Protein (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IRETIndexed code and label stable
Retinol (mcg)
- Observed years
- 2021–2023
- 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
- Retinol (mcg) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — Retinol (mcg) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS040Indexed code and label stable
SFA 4:0 (Butanoic) (gm)
- Observed years
- 2021–2023
- 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
- SFA 4:0 (Butanoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — SFA 4:0 (Butanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS060Indexed code and label stable
SFA 6:0 (Hexanoic) (gm)
- Observed years
- 2021–2023
- 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
- SFA 6:0 (Hexanoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — SFA 6:0 (Hexanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS080Indexed code and label stable
SFA 8:0 (Octanoic) (gm)
- Observed years
- 2021–2023
- 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
- SFA 8:0 (Octanoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — SFA 8:0 (Octanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS100Indexed code and label stable
SFA 10:0 (Decanoic) (gm)
- Observed years
- 2021–2023
- 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
- SFA 10:0 (Decanoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — SFA 10:0 (Decanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)
DR1IS120Indexed code and label stable
SFA 12:0 (Dodecanoic) (gm)
- Observed years
- 2021–2023
- 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
- SFA 12:0 (Dodecanoic) (gm) — 2021-2023
Cycle-by-cycle release history
- 2021-2023: DR1IFF_L — SFA 12:0 (Dodecanoic) (gm) — Dietary Interview - Individual Foods, First Day (Dietary)