Asthma

Data are for the U.S.

Morbidity
  • Number of adults aged 18 and over who currently have asthma: 19.0 million
  • Percent of adults aged 18 and over who currently have asthma: 7.7%

Source: Summary Health Statistics Tables for U.S. Adults: National Health Interview Survey, 2017, tables A-2b, A-2c pdf icon[PDF – 137 KB]

  • Number of children under age 18 years who currently have asthma: 6.2 million
  • Percent of children under age 18 years who currently have asthma: 8.4%

Source: Summary Health Statistics Tables for U.S. Children: National Health Interview Survey, 2017, tables C-1b, C-1c pdf icon[PDF – 99.8 KB]

Physician office visits
  • Percent of visits to office-based physician with asthma indicated on the medical record: 6.2%

Source: National Ambulatory Medical Care Survey: 2015 State and National Summary Tables, tables 19 pdf icon[PDF – 697 MB]

Emergency department visits
  • Number of visits to emergency departments with asthma as the primary diagnosis: 1.8 million

Source: National Hospital Ambulatory Medical Care Survey: 2016 Emergency Department Summary Tables, table 16 pdf icon[PDF – 738 KB]

Mortality
  • Number of deaths: 3,518
  • Deaths per 100,000 population: 1.1

Source: Deaths: Final Data for 2016, Supplemental Tables, tables I-12, I-13 pdf icon[PDF – 2 MB]

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Page last reviewed: January 19, 2017