Harmonization summary
0 label-stable codes
- Label changes detected
- 1
- Multiple dataset contexts
- 0
- Unique codes
- 1
- 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.
1matching variable codes
5 release records across 5 datasets and 5 cycles.
Search scope
Results for “BMDBMIC”
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.
BMDBMICCompatible with harmonization
BMI Category - Children/Adolescents
- Observed years
- 2011–2023
- Release records
- 5
- Datasets
- 5
- 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/Adolescents — 2011-2012
- BMI Category - Children/Youth — 2013-2014 · 2015-2016 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 2011-2012: BMX_G — BMI Category - Children/Adolescents — Body Measures (Examination)
- 2013-2014: BMX_H — BMI Category - Children/Youth — Body Measures (Examination)
- 2015-2016: BMX_I — BMI Category - Children/Youth — Body Measures (Examination)
- 2017-2020: P_BMX — BMI Category - Children/Youth — Body Measures (Examination)
- 2021-2023: BMX_L — BMI Category - Children/Youth — Body Measures (Examination)