2021 National Health Interview Survey (NHIS) Data

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Percentage of Persons With Current Asthma1 by Age, United States: National Health Interview Survey, 2021

Table 6-1
Percentage of Persons Who Had Asthma Attack1 Among Those With Current Asthma2
by Age, United States: National Health Interview Survey, 2021
Characteristic All Ages
Total		 Children
Age <18		 Adults
Age 18+		 0–4 5–14 15–19 20–24 25–34 35–64 65+
Total: 39.4 38.7 39.6 63.1 40.0 29.4 35.0 38.9 44.9 30.3
   Male 34.3 38.4 32.8 52.2 44.6 16.8 23.1 32.3 38.2 28.4
    Female 43.0 39.2 43.6 76.6 33.1 44.2 44.3 44.3 48.5 31.0
White Non–Hispanic: 40.4 39.4 40.6 69.2 41.8 31.6 35.5 41.5 45.6 30.8
    Male 34.5 41.0 32.9 62.3 48.8 14.9* 22.2* 34.2 38.4 24.0
    Female 44.4 37.5 45.2 84.3 33.2 47.8 45.3 47.3 50.1 33.5
Black Non–Hispanic: 34.0 36.2 33.3 46.1* 39.8 26.3* 24.9* 24.6 43.2 20.1
    Male 32.1 40.2 27.9 ** 49.7 29.5* ** 18.3* 34.6 34.2*
    Female 35.4 31.5 36.4 73.3 27.4* ** 35.7* 29.7 46.7 16.9*
Other Non–Hispanic: 43.2 43.7 43.0 69.8 49.6 ** 57.7 43.5 41.4 40.2
    Male 34.9 33.4 35.6 ** 39.4 ** 41.5* ** 34.2* 54.4*
    Female 49.5 61.8 47.6 65.1* 75.0 ** 69.0 58.5 44.4 28.0*
Hispanic: 39.2 37.9 39.7 70.3 32.9 37.7 24.7* 48.5 44.8 27.5*
    Male 35.7 34.5 36.6 56.2* 36.2 ** ** 50.7 43.4 **
    Female 42.1 44.6 41.5 95.1 24.9* 66.0 28.7* 46.5 45.4 30.2*
    Mexican/Mexican–American:3 35.9 36.6 35.5 ** 37.3 29.6* ** 63.6 35.6 **
        Male 36.3 36.4 36.3 ** 40.2 ** ** 63.9 33.3* **
        Female 35.5 37.2* 34.9 ** 29.9* 54.4* ** 63.2 36.6 **
    Other Hispanic:3 41.7 39.2 42.4 76.5 24.6* 49.6* 28.0* 38.6 52.6 35.3*
        Male 34.3 29.8* 36.7 59.1* 28.2* ** ** 40.0* 54.5 **
        Female 46.1 53.5 44.9 ** ** 74.3 37.7* 37.5* 51.9 39.9*
Region:
    Northeast 36.4 34.9 36.6 76.6 28.4 32.9* 29.3* 31.1 44.3 26.0
    Midwest 38.2 42.2 37.2 69.7 44.8 26.1* 20.9* 40.3 42.8 28.0
    South 40.8 39.9 41.0 58.1 42.8 28.6 49.1 33.4 47.1 30.0
    West 40.5 35.1 41.7 ** 35.5 32.2 29.8* 50.8 44.0 35.6
Ratio of Family Income to Poverty Threshold:4
    0.0–0.99 43.6 47.8 41.9 67.2 51.9 32.7* 41.7 46.7 45.6 26.2
    1.00–2.49 40.8 43.1 40.2 67.5 43.0 36.7 44.6 35.3 45.1 30.9
    2.50–4.49 35.7 33.8 36.1 57.7* 34.8 18.7* 32.8* 38.1 43.4 23.3
    4.50 and above 39.0 28.9 40.7 56.9* 28.2 29.7 18.3* 39.3 45.4 36.9

Source: National Health Interview Survey, National Center for Health Statistics, CDC
Compiled 3/27/2023

1Having had one or more asthma attacks, which is defined by persons who answered “yes” to the question: “During the past 12 months, have you had an episode of asthma or an asthma attack?” among people with current asthma.
2Persons who answered “yes” to the questions: “Have you EVER been told by a doctor or other health professional that you had asthma?” and “Do you still have asthma?”
All relative standard errors are <30% unless otherwise indicated.
*Relative standard error of the estimate is 30%–50%; the estimate is unreliable.
**Suppressed if relative standard error of the estimate exceeds 50% or if standard error is missing or 0.
3As a subset of Hispanic.
4Missing responses imputed. See NHIS “Imputed Income Technical Document”: https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHIS/2020/NHIS2020-imputation-techdoc-508.pdf”.
Notes: Sex determined by “male” or “female” response to question: “Are you male or female?” Additional information on methods and variable description available at: https://www.cdc.gov/asthma/nhis/default.htm.

Asthma and Community Health Branch
National Center for Environmental Health, Centers for Disease Control and Prevention

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