Harmonization summary
0 label-stable codes
- Label changes detected
- 0
- Multiple dataset contexts
- 1
- 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
8 release records across 8 datasets and 2 cycles.
Search scope
Results for “ETHNICTY”
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.
ETHNICTYCompatible with harmonization
Ethnicity - Recode
- Observed years
- 2005–2008
- Release records
- 8
- Datasets
- 8
- Components
- Laboratory
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
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
- Ethnicity - Recode — 2005-2006 · 2007-2008
Cycle-by-cycle release history
- 2005-2006: BFRPOL_D — Ethnicity - Recode — Brominated Flame Retardants (BFRs) - Pooled Samples (Laboratory)
- 2005-2006: DOXPOL_D — Ethnicity - Recode — Polychlorinated dibenzo-p-dioxins (PCDDs), Dibenzofurans (PCDFs) & Coplanar Polychlorinated Biphenyls (cPCBs) - Pooled Samples (Laboratory)
- 2005-2006: PCBPOL_D — Ethnicity - Recode — Non-dioxin-like Polychlorinated Biphenyls & Mono-ortho-substituted Polychlorinated Biphenyls - Pooled Samples (Laboratory)
- 2005-2006: PSTPOL_D — Ethnicity - Recode — Pesticides - Organochlorine Pesticides - Pooled Samples (Laboratory)
- 2007-2008: BFRPOL_E — Ethnicity - Recode — Brominated Flame Retardants (BFRs) - Pooled Samples (Laboratory)
- 2007-2008: DOXPOL_E — Ethnicity - Recode — Polychlorinated dibenzo-p-dioxins (PCDDs), Dibenzofurans (PCDFs) & Coplanar Polychlorinated Biphenyls (cPCBs) - Pooled Samples (Laboratory)
- 2007-2008: PCBPOL_E — Ethnicity - Recode — Non-dioxin-like Polychlorinated Biphenyls & Mono-ortho-substituted Polychlorinated Biphenyls - Pooled Samples (Laboratory)
- 2007-2008: PSTPOL_E — Ethnicity - Recode — Pesticides - Organochlorine Pesticides - Pooled Samples (Laboratory)