Harmonization summary
0 label-stable codes
- Label changes detected
- 1
- Multiple dataset contexts
- 1
- Unique codes
- 1
- Enriched codes in this report
- 1
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
13 release records across 13 datasets and 12 cycles.
Search scope
Results for “RIDAGEYR”
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.
RIDAGEYRCompatible with harmonization
Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age.
- Observed years
- 1999–2023
- Release records
- 13
- Datasets
- 13
- Components
- Demographics · Laboratory
Qualified Praxis harmonization assessment
Compatible with harmonization · high confidence
RIDAGEYR remains age in years at screening, but CDC/NCHS changed the public-use disclosure top-code from 85 years and older through 2005-2006 to 80 years and older beginning in 2007-2008. The construct is continuous, but exact values in the oldest ages are not directly comparable across that disclosure boundary.
Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication
Relevant boundaries: 2005-2006 → 2007-2008
Praxis harmonization actions
- For pooled analyses spanning the 2005-2006 to 2007-2008 boundary, harmonize the upper age range to a common 80+ category or restrict continuous-age analyses to participants younger than 80. Do not treat published top-coded values as exact ages.
Supporting CDC/NCHS evidence
Supporting source-evidence notes
CDC/NCHS notes mention these survey or subsample weight variables across the indexed releases: WTINT2YR, WTINT4YR, WTMEC2YR, WTMEC4YR, WTINTPRP, WTMECPRP. Do not apply them together; choose the cycle- and subsample-appropriate weight for the releases included in the analysis. Eligibility/target wording changes across releases; apply cycle-specific eligibility before pooling.
These notes summarize indexed evidence and method-text signals. They do not supersede the qualified harmonization assessment above.
- Documented weight variables
- WTINT2YR · WTINT4YR · WTMEC2YR · WTMEC4YR · WTINTPRP · WTMECPRP
- Units observed
- Not stated / categorical
- Enriched releases
- 13
- Method-change status
- stable method documentation
Method-change assessment
Captured method documentation is stable
Captured method documentation is textually stable across enriched releases. This supports, but does not by itself prove, measurement equivalence across cycles.
- Releases with method evidence
- 1
- Flagged method boundaries
- 0
- Assessment status
- Captured method documentation is stable
- Inference rule
- Documentation differences ≠ confirmed method changes
Cycle-by-cycle method chronology
- 2009-2010: SSIF_F_R — Antibody titers against H3N2v and historical seasonal H3N2 influenza viruses were measured with hemagglutination inhibition (HI) assay at Influenza Division, Centers for Disease Control and Prevention. The selected H3N2v viruses were: A/Indiana/17/2013, A/Indiana/6/2013, and A/Ohio/13/2012. The selected historical H3N2 viruses were: A/Aichi/2/1968, A/Victoria/3/1975, A/Bangkok/1/1979, A/Shanghai/11/1987, A/Beijing/32/1992, A/Wuhan/359/1995, A/Sydney/5/1997, A/Fujian/411/2002, and A/Brisbane/10/…
Praxis-enriched cycle evidence
- 1999-2000: DEMO · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTINT4YR, WTMEC2YR, WTMEC4YR
- 2001-2002: DEMO_B · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTINT4YR, WTMEC2YR, WTMEC4YR
- 2003-2004: DEMO_C · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2005-2006: DEMO_D · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2007-2008: DEMO_E · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2009-2010: DEMO_F · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2009-2010: SSIF_F_R · Target: Both males and females 6 YEARS - 150 YEARS · Method evidence captured
- 2011-2012: DEMO_G · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2013-2014: DEMO_H · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2015-2016: DEMO_I · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2017-2018: DEMO_J · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
- 2017-2020: P_DEMO · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINTPRP, WTMECPRP
- 2021-2023: DEMO_L · Target: Both males and females 0 YEARS - 150 YEARS · Weight evidence: WTINT2YR, WTMEC2YR
Variable names / labels over time
- Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age. — 1999-2000 · 2001-2002 · 2003-2004 · 2005-2006
- Best age in years of the sample person at time of HH screening. Individuals 80 and over are topcoded at 80 years of age. — 2007-2008 · 2009-2010
- Age in years at screening — 2009-2010
- Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. — 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020
- Age in years of the participant at the time of screening. Individuals 80 and over are top-coded at 80 years of age. — 2021-2023
Cycle-by-cycle release history
- 1999-2000: DEMO — Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2001-2002: DEMO_B — Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2003-2004: DEMO_C — Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2005-2006: DEMO_D — Best age in years of the sample person at time of HH screening. Individuals 85 and over are topcoded at 85 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2007-2008: DEMO_E — Best age in years of the sample person at time of HH screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2009-2010: DEMO_F — Best age in years of the sample person at time of HH screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2009-2010: SSIF_F_R — Age in years at screening — Influenza A (H3N2) Variant Virus & Historical Seasonal H3N2 Influenza Viruses Antibodies (Surplus) (Laboratory) — Note: RDC Only
- 2011-2012: DEMO_G — Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables & Sample Weights (Demographics)
- 2013-2014: DEMO_H — Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables and Sample Weights (Demographics)
- 2015-2016: DEMO_I — Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables and Sample Weights (Demographics)
- 2017-2018: DEMO_J — Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables and Sample Weights (Demographics)
- 2017-2020: P_DEMO — Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. — Demographic Variables and Sample Weights (Demographics)
- 2021-2023: DEMO_L — Age in years of the participant at the time of screening. Individuals 80 and over are top-coded at 80 years of age. — Demographic Variables and Sample Weights (Demographics)