National Health Interview Survey (NHIS) Restricted Variables
Detailed variable lists are not available for years prior to 1997.
1997 – 2018 Restricted and Public Use Variable Lists *
Restricted and Public Use Variable Lists *
- 1997_2003 NHIS Variables Sorted By Question_With_IncomeVarspdf icon [PDF – 455 KB]
- 2004-2008 NHIS Variables Sorted by Questionpdf icon [PDF – 564 KB]
- 2009-2013 NHIS Variables Sorted by Questionpdf icon [PDF – 852 KB]
- 2014-2018 NHIS Variables Sorted by Question pdf icon[PDF – 918 KB]
*All lists are sorted by question.
More detailed documentation, such as variable values and questionnaire information, for 1997 to 2018 are available by request. If you are interested in receiving the documentation, please contact RDCA@cdc.gov.
2019 Restricted Use Data
2019 NHIS Sample Adult Codebook for Restricted-Use Variables: https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHIS/2019/adult-nofreq-codebook.pdfpdf icon
2019 NHIS Sample Child Codebook for Restricted-Use Variables: https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHIS/2019/child-nofreq-codebook.pdfpdf icon
2019 NHIS Paradata Codebook for Restricted-Use Variables: https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHIS/2019/paradata-nofreq-codebook.pdfpdf icon
Other NHIS restricted Data
Preliminary Quarterly Microdata Files