Codes and Frequencies
For sample adults age 18 and older, DEMENTIAEV reports responses to the question, "Have you ever been told by a doctor or other health professional that you had ... Dementia, including Alzheimer's disease?"
The 2019 Field Representative's Manual defines Dementia as "the loss of cognitive functioning - thinking, remembering, and reasoning - and behavioral abilities to such an extent that it interferes with a person's daily life and activities."
Questionnaire design changes introduced in 2019 limit comparability with earlier years. 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.
- 2007: Sample adults age 18+.
- 2019-2020: Sample adults age 18+.
- 2007, 2019-2020
- 2007, 2019-2020 : SAMPWEIGHT