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Still have asthma

Codes and Frequencies

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For sample adults and sample children who were ever diagnosed by a health professional as having asthma (ASTHMAEV), ASTHMASTIL reports answers to the question, "Do you/does [sample child] still have asthma?"

The Field Representative's Manual for 2001 forward defined asthma as "a chronic respiratory disorder characterized by labored breathing and wheezing resulting from obstructed and constricted air passages." This definition was not routinely shared with respondents.

Other asthma-related questions were periodically included in the survey; see (ASTHMAEV) for a summary of these questions.


This variable is completely comparable prior to 2019.

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.


  • 2001-2018: Sample adults age 18+ and sample children under age 18 who were ever told by a doctor that they had asthma.
  • 2019-2022: Sample adults age 18+ and sample children age 0-17 who were ever told by a doctor that they had asthma (ASTHMAEV).


  • 2001-2022