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Praxis Data Lab

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.

1variable selected
Praxis harmonization guidance available

Praxis found harmonization conditions for this study and has surfaced them below with the supporting source evidence.

1 variable assessment

BAQ321C
Evidence developinglow confidence

Questionnaire

The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} had problems with... unsteadiness - a feeling of being off-balance or not stable when standing or sitting upright?

Source releases
1
Available cycles
2021-2023
Dataset
Balance

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

Remove from studyVariable historyCDC source