Harmonization summary
0 label-stable codes
- Label changes detected
- 1
- 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
16 release records across 16 datasets and 12 cycles.
Search scope
Results for “RIDRETH1”
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.
RIDRETH1Compatible
Recode of reported race and ethnicity information.
- Observed years
- 1999–2023
- Release records
- 16
- Datasets
- 16
- Components
- Demographics · Laboratory
Qualified Praxis harmonization assessment
Compatible · high confidence
RIDRETH1 is retained as the longitudinal five-category race/Hispanic-origin recode, including after the expanded RIDRETH3 variable was introduced in 2011-2012. CDC/NCHS specifically retained RIDRETH1 to support comparison with earlier Continuous NHANES cycles.
Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication
Praxis harmonization actions
- Use RIDRETH1 when a common five-category race/Hispanic-origin construct is required across earlier and later cycles. Apply survey-design requirements separately and do not substitute RIDRETH3 categories without an explicit recode.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Recode of reported race and ethnicity information. — 1999-2000 · 2001-2002 · 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010
- Ethnicity - Recode — 2009-2010
- Recode of reported race and Hispanic origin information — 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Cycle-by-cycle release history
- 1999-2000: DEMO — Recode of reported race and ethnicity information. — Demographic Variables & Sample Weights (Demographics)
- 2001-2002: DEMO_B — Recode of reported race and ethnicity information. — Demographic Variables & Sample Weights (Demographics)
- 2003-2004: DEMO_C — Recode of reported race and ethnicity information. — Demographic Variables & Sample Weights (Demographics)
- 2005-2006: DEMO_D — Recode of reported race and ethnicity information. — Demographic Variables & Sample Weights (Demographics)
- 2007-2008: DEMO_E — Recode of reported race and ethnicity information. — Demographic Variables & Sample Weights (Demographics)
- 2009-2010: BFRPOL_F — Recode of reported race and Hispanic origin information — Brominated Flame Retardants (BFRs) - Pooled Samples (Laboratory)
- 2009-2010: DEMO_F — Recode of reported race and ethnicity information. — Demographic Variables & Sample Weights (Demographics)
- 2009-2010: DOXPOL_F — Ethnicity - Recode — Polychlorinated dibenzo-p-dioxins (PCDDs), Dibenzofurans (PCDFs) & Coplanar Polychlorinated Biphenyls (cPCBs) - Pooled Samples (Laboratory)
- 2009-2010: PCBPOL_F — Recode of reported race and Hispanic origin information — Non-dioxin-like Polychlorinated Biphenyls & Mono-ortho-substituted Polychlorinated Biphenyls - Pooled Samples (Laboratory)
- 2009-2010: PSTPOL_F — Recode of reported race and Hispanic origin information — Pesticides - Organochlorine Pesticides - Pooled Samples (Laboratory)
- 2011-2012: DEMO_G — Recode of reported race and Hispanic origin information — Demographic Variables & Sample Weights (Demographics)
- 2013-2014: DEMO_H — Recode of reported race and Hispanic origin information — Demographic Variables and Sample Weights (Demographics)
- 2015-2016: DEMO_I — Recode of reported race and Hispanic origin information — Demographic Variables and Sample Weights (Demographics)
- 2017-2018: DEMO_J — Recode of reported race and Hispanic origin information — Demographic Variables and Sample Weights (Demographics)
- 2017-2020: P_DEMO — Recode of reported race and Hispanic origin information — Demographic Variables and Sample Weights (Demographics)
- 2021-2023: DEMO_L — Recode of reported race and Hispanic origin information — Demographic Variables and Sample Weights (Demographics)