ADfdsec
Indexed NHANES variable
Questionnaire
Adult food security category for last 12 months
- Source releases
- 2
- Available cycles
- 1999-2000 · 2001-2002
- Dataset
- Food Security
Praxis Data Lab · Study Builder
Build your NHANES study with harmonization intelligence.
Combine variables from the indexed Continuous NHANES catalog, choose the cycles you need, and see how Praxis connects source history, methods, cycle boundaries, and cross-code lineage into a study-specific harmonization view.
3variables selected
Praxis harmonization guidance available
Praxis found harmonization conditions for this study and has surfaced them below with the supporting source evidence.
3 variable assessments
ALD040
Compatible with harmonizationmoderate confidence
Questionnaire
During the past 30 days, on how many days did you have 5 or more drinks of alcohol in a row, that is, within a couple of hours?
- Source releases
- 11
- Available cycles
- 1999-2000 · 2005-2006 · 2007-2008 · 2009-2010 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
- Dataset
- Alcohol Use - Youth
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 → 2005-2006 · 2005-2006 → 2007-2008 · 2011-2012 → 2013-2014 · 2013-2014 → 2015-2016 · 2015-2016 → 2017-2018 · 2017-2018 → 2017-2020 · 2017-2020 → 2021-2023
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
ARXO2WD
Evidence 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