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
7 release records across 7 datasets and 7 cycles.
Search scope
Results for “AUDTYL49”
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.
AUDTYL49Compatible with harmonization
Tympanometry-Left Ear, Measurement 49
- Observed years
- 1999–2012
- Release records
- 7
- Datasets
- 7
- 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: 1999-2000 → 2001-2002 · 2001-2002 → 2003-2004 · 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2011-2012
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.
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
Supporting CDC/NCHS evidence
Variable names / labels over time
- Tympanometry-Left Ear, Measurement 49 — 1999-2000 · 2001-2002 · 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012
Cycle-by-cycle release history
- 1999-2000: AUXTYM — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)
- 2001-2002: AUXTYM_B — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)
- 2003-2004: AUXTYM_C — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)
- 2005-2006: AUXTYM_D — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)
- 2007-2008: AUXTYM_E — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)
- 2009-2010: AUXTYM_F — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)
- 2011-2012: AUXTYM_G — Tympanometry-Left Ear, Measurement 49 — Audiometry - Tympanometry (Examination)