Harmonization summary
0 label-stable codes
- Label changes detected
- 0
- Multiple dataset contexts
- 2
- Unique codes
- 2
- Enriched codes in this report
- 0
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.
2matching variable codes
17 release records across 17 datasets and 10 cycles.
Search scope
Results for “DR1HELP”
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.
DR1HELPCompatible with harmonization
Who helped in responding for this interview
- Observed years
- 2015–2023
- Release records
- 7
- Datasets
- 7
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
- Select the weight appropriate to each cycle and subsample; when pooling cycles, construct the combined weight according to NHANES guidance rather than reusing a single-cycle weight unchanged.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Who helped in responding for this interview — 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2015-2016: DR1TOT_I — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2015-2016: DS1TOT_I — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2018: DR1TOT_J — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2018: DS1TOT_J — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2017-2020: P_DR1TOT — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2017-2020: P_DS1TOT — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2021-2023: DR1TOT_L — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
DR1HELPDCompatible with harmonization
Who helped in responding for this interview
- Observed years
- 2003–2014
- Release records
- 10
- Datasets
- 10
- Components
- Dietary
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Review the adjacent codebooks/methods. Keep this boundary as documentation variation unless source evidence confirms a substantive method or instrument change.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Who helped in responding for this interview — 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014
Cycle-by-cycle release history
- 2003-2004: DR1TOT_C — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2005-2006: DR1TOT_D — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DR1TOT_E — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2007-2008: DS1TOT_E — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2009-2010: DR1TOT_F — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2009-2010: DS1TOT_F — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2011-2012: DR1TOT_G — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2011-2012: DS1TOT_G — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)
- 2013-2014: DR1TOT_H — Who helped in responding for this interview — Dietary Interview - Total Nutrient Intakes, First Day (Dietary)
- 2013-2014: DS1TOT_H — Who helped in responding for this interview — Dietary Supplement Use 24-Hour - Total Dietary Supplements, First Day (Dietary)