ACD080Compatible with harmonizationmoderate confidence
Questionnaire
In what country was {your/SP's} mother born?
- Source releases
- 3
- Available cycles
- 1999-2000 · 2001-2002 · 2003-2004
- Dataset
- Acculturation
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
Evidence signals: source-derived
Relevant boundaries: 1999-2000 → 2001-2002 · 2001-2002 → 2003-2004
Praxis harmonization actions
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
Supporting CDC/NCHS evidence
ARXO2WDEvidence developinglow confidence
Examination
OCCIPUT-TO-WALL DISTANCE IN CENTIMETERS
- Source releases
- 1
- Available cycles
- 2009-2010
- Dataset
- Arthritis Body Measures
No normalized longitudinal change evidence is available for this variable. Absence of events must not be interpreted as proof of cross-cycle equivalence.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
DCDINDEXCompatible with harmonizationmoderate confidence
Laboratory
- Source releases
- 3
- Available cycles
- 1999-2000 · 2001-2002 · 2003-2004
- Dataset
- Lead - Dust
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
Evidence signals: source-derived · automated-difference
Relevant boundaries: 1999-2000 → 2001-2002 · 2001-2002 → 2003-2004
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
DCQ070CCompatible with harmonizationmoderate confidence
Laboratory
Indicates whether area rug was found in room-floor sample
- Source releases
- 3
- Available cycles
- 1999-2000 · 2001-2002 · 2003-2004
- Dataset
- Lead - Dust
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
Evidence signals: source-derived · automated-difference
Relevant boundaries: 1999-2000 → 2001-2002 · 2001-2002 → 2003-2004
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
HRXHGEvidence developinglow confidence
Laboratory
Total Hair Mercury as ug mercury/gram hair (ppm): MQL is Detection Limit (See Documentation for Definitions)
- Source releases
- 1
- Available cycles
- 1999-2000
- Dataset
- Mercury - Hair
No normalized longitudinal change evidence is available for this variable. Absence of events must not be interpreted as proof of cross-cycle equivalence.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
