Codes and Frequencies
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Comparability
Prior to 2019, this variable is comparable over time. The NHIS questionnaire was substantially redesigned in 2019 to introduce a different data collection structure and new content. For more information on changes in terminology, universes, and data collection methods beginning in 2019, please see the user note.
Availability
- 2000, 2015, 2018, 2021
Weights
- 2000, 2015, 2018, 2021 : SAMPWEIGHT

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