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.

2variables selected

Praxis harmonization guidance available

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

2 variable assessments

ALQ155

Evidence developinglow confidence

Questionnaire

For about how many years did {you/SP} drink {DISPLAY NUMBER} or more drinks of any kind of alcoholic beverage almost every day?

Source releases: 1
Available cycles: 2011-2012
Dataset: Alcohol Use

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 study Variable history CDC source

DR1_320

Evidence developinglow confidence

Dietary

Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.

Source releases: 1
Available cycles: 2003-2004
Dataset: Dietary Interview - Total Nutrient Intakes, First Day

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 study Variable history CDC source