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

3 research variables · 1 cycle

Edit study
Complete the study specification first.
  • ARXO2WD is not released for 2003-2004.
  • DSXFD1LD is not released for 2003-2004.
ARXO2WDOCCIPUT-TO-WALL DISTANCE IN CENTIMETERS
DSXFD1LDCat allergen Felis domesticus 1 (Fel d 1) dust allergen, limit of detection (ng/mL dust)
SIAPROXYWas a Proxy respondent used in conducting the Sample Person (SP) interview?

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

Preparation normally takes 5–10 minutes; please allow up to 15 minutes. You can leave after payment and return through My Study Packages, and we’ll email your secure download link when it is ready.