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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

5 research variables · 1 cycle

Edit study
Complete the study specification first.
  • ARXO2WD is not released for 1999-2000.
  • DR1_320 is not released for 1999-2000.
  • SIAPROXY is not released for 1999-2000.
ARXO2WDOCCIPUT-TO-WALL DISTANCE IN CENTIMETERS
DCDINDEX
DR1_320Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.
SDMVSTRAMasked Variance Unit Pseudo-Stratum variable for variance estimation
SIAPROXYWas a Proxy respondent used in conducting the Sample Person (SP) interview?

Cycles: 1999-2000

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.