Data intelligence · automation · analyticsA Praxis Global Institute platform
Praxis Data Lab

Your Study Package

Everything you need to move from data to research.

Confirm your variables and cycles, then continue with one organized, reproducible package built from official CDC/NCHS source files.

A research team reviewing results together around a laptop

Your specification

2 research variables · 1 cycle

Edit study
Complete the study specification first.
  • ARXO2WD is not released for 2003-2004.
  • BAQ201 is not released for 2003-2004.
ARXO2WDOCCIPUT-TO-WALL DISTANCE IN CENTIMETERS
BAQ201Can you move head 30 degrees left/right?

Cycles: 2003-2004

Up to 50 researcher-selected variables per one-time package.

Included automatically · no limit charge

Survey-ready foundations

  • SEQN participant identifier
  • NHANES cycle indicator
  • Eligibility fields
  • Appropriate sample weight
  • Survey strata
  • Survey PSU

Complete delivery

Reproducible files, not just a data export

  • Cleaned CSV, Parquet, and Excel outputs
  • Original CDC/NCHS source files and checksums
  • Codebook, harmonization record, and provenance
  • README, validation summary, and analysis specification
  • R and Python starter code

Your Study Package is usually prepared within a few minutes. Once ready, download time depends only on file size and internet speed.