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

1 cycle in this study.

Praxis harmonization check: ready

The selected variables and cycle span have no indexed blocking harmonization boundary.

2 variable assessments

Your study specification is assembled

Your complete Study Package is ready to review.

See your selected variables, automatic survey fields, reproducible deliverables, and early access price in one clear summary.

AUDTYL23
Compatiblemoderate confidence

Examination

Tympanometry-Left Ear, Measurement 23

Source releases
7
Available cycles
1999-2000 · 2001-2002 · 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012
Dataset
Audiometry - Tympanometry

Praxis found no indexed change boundary inside the selected cycle span that prevents pooling. Standard NHANES design requirements still apply.

Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence

Files for selected cycles
DR1FS
Compatiblemoderate confidence

Dietary

Where did you get (this/most of the ingredients for this) {FOODNAME}?

Source releases
10
Available cycles
2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2011-2012 · 2013-2014 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Dataset
Dietary Interview - Individual Foods, First Day

Praxis found no indexed change boundary inside the selected cycle span that prevents pooling. Standard NHANES design requirements still apply.

Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence

Files for selected cycles