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Using the 2020 NHIS Sample Adult Data Sets

The NHIS 2020 public-use data set release is different from previous NHIS data releases. Because of COVID-19’s impact on data collection, three different NHIS adult data sets are being released for different purposes. Explanations of the appropriate uses for each data set, as well as links to summaries, technical documents, and data files for each set, are available on this page.

Disclaimer for the 2020 NHIS Sample Adult Annual

You are accessing the 2020 NHIS Sample Adult Annual data set. Use these data for single-year estimates and trend analysis. These data cannot be used for longitudinal or multi-year analysis.

  • Summary
  • Codebook
  • Codebook for restricted-use variables
  • ASCII data file
  • CSV data file
  • SAS input statements
  • SPSS input statements
  • Stata input statements
Disclaimer for the 2020 NHIS Sample Adult Longitudinal

You are accessing the 2020 NHIS Sample Adult Longitudinal data set. Use these data for analyses that look at responses for the same individuals over time by merging them with the 2019 and 2020 NHIS annual files. These data should not be used for single-year estimates and trend analysis. These data cannot be used for multi-year analysis.

  • Summary
  • Codebook
  • ASCII data file
  • CSV data file
  • SAS input statements
  • SPSS input statements
  • Stata input statements
Disclaimer for the 2020 NHIS Sample Adult Partial

You are accessing the 2020 NHIS Sample Adult Partial data set. Use these data when you need to combine data from multiple years that include 2019 and 2020. These data should not be used for single-year estimates and trend analysis. These data cannot be used for longitudinal analysis.

  • Summary
  • Codebook
  • ASCII data file
  • CSV data file
  • SAS input statements
  • SPSS input statements
  • Stata input statements