2020 nhis
2020 NHIS
The COVID-19 pandemic created challenges conducting in-person interviews for the 2020 NHIS, requiring changes to field procedures. These changes resulted in three analytic data files for sample adults.
- Sample Adult Interview for single-year 2020 estimates and trend analyses
- Sample Adult Longitudinal for analyses of data from 2019 and 2020 for the same individuals
- Sample Adult Partial for combining data from multiple years that include 2019 and 2020
Sample Adult Interview
Sample Child Interview
Using the NHIS
- Survey Description Document pdf icon[1.7 MB]
- Weighting Procedures and Nonresponse Bias Evaluation pdf icon[562 KB]
- Weighting and Analysis Reference Table pdf icon[92 KB]
- Imputed Income Technical Document pdf icon[422 KB]
- Paradata Survey Description Document pdf icon[414 KB]
- Restricted-use Variable Access
- Industry and Occupation Appendix excel icon[62 KB]
- File Record Length and Size Summary pdf icon[92 KB]
- Checksum pdf icon[94 KB]
Survey Implementation Materials
- Survey Questionnaire – English pdf icon[PDF – 4.3 MB]
- Survey Questionnaire – Spanish pdf icon[PDF – 4.4 MB]
- NHIS Sponsored Content pdf icon[290 KB]
- Field Representative Manual pdf icon[PDF – 4.3 MB]
- NHIS Instrument Flowchart, Q1-Q2 pdf icon[PDF – 102 KB]
- NHIS Instrument Flowchart, Q3-Q4 pdf icon[180 KB]
- Survey Brochure pdf icon[343 KB]
- Advance Letter pdf icon[350 KB]
- Advance Letter for Reinterview pdf icon[406 KB]
Page last reviewed: September 30, 2021
Content source: National Center for Health Statistics