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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 check: ready

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

1 variable assessment

RIDRETH3
Compatiblehigh confidence

Demographics

Recode of reported race and Hispanic origin information, with Non-Hispanic Asian Category

Source releases
18
Available cycles
2011-2012 · 2011-2012 · 2011-2012 · 2011-2012 · 2011-2012 · 2013-2014 · 2013-2014 · 2013-2014 · 2013-2014 · 2013-2014 · 2015-2016 · 2015-2016 · 2015-2016 · 2015-2016 · 2015-2016 · 2017-2018 · 2017-2020 · 2021-2023
Dataset
Demographic Variables & Sample Weights

RIDRETH3 was introduced in 2011-2012 as an expanded race/Hispanic-origin recode that distinguishes Non-Hispanic Asian participants following the revised NHANES sampling design. It is a stable construct within its released era, but it is not simply a renamed RIDRETH1.

Evidence provenance: CDC/NCHS source-confirmed evidence · Praxis deterministic adjudication

Evidence signals: source-stated

Praxis harmonization actions
  • Pool RIDRETH3 within 2011-2012 and later calibrated cycles when the expanded categories are analytically appropriate. Treat RIDRETH1 and RIDRETH3 as parallel construct variants; use an explicit common recode when combining analyses across their differing category schemes.
Supporting CDC/NCHS evidence
Remove from studyVariable historyCDC source