Harmonization summary
1 label-stable codes
- Label changes detected
- 0
- 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
4 release records across 4 datasets and 4 cycles.
Search scope
Results for “DMDHHSZB”
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.
DMDHHSZBCompatible with harmonization
Number of children aged 6-17 years old in the household
- Observed years
- 2011–2018
- Release records
- 4
- Datasets
- 4
- 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
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
- Number of children aged 6-17 years old in the household — 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018
Cycle-by-cycle release history
- 2011-2012: DEMO_G — Number of children aged 6-17 years old in the household — Demographic Variables & Sample Weights (Demographics)
- 2013-2014: DEMO_H — Number of children aged 6-17 years old in the household — Demographic Variables and Sample Weights (Demographics)
- 2015-2016: DEMO_I — Number of children aged 6-17 years old in the household — Demographic Variables and Sample Weights (Demographics)
- 2017-2018: DEMO_J — Number of children aged 6-17 years old in the household — Demographic Variables and Sample Weights (Demographics)