Most Recent National Asthma Data (2024)

National
Current Asthma¹ Prevalence by Select Sociodemographic Characteristics (2021)

Abbreviations: NH = Non-Hispanic, SE = Standard Error
¹Persons 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?”
²Numbers within selected characteristics may not sum to total due to rounding and missing values.
³The weighted number of survey participants of the intended population group with current asthma divided by the weighted number of all survey participants in the intended population group and then multiply by 100.
⁴Persons who answered “male” or “female” to the question “Are you male or female?”
⁵Poverty level is based on family income and family size using the U.S. Census Bureau’s poverty thresholds. Poverty level was calculated separately using 10 imputed income files.

Source: 2021 National Health Interview Survey (NHIS) Data (Note: some detailed age group data was analyzed separately).

Current Asthma¹ Prevalence by Race and Ethnicity Among Children and Adults (2019–2021)

Abbreviations: NH = Non-Hispanic, AI/AN = American Indian/ Alaska Native, SE = Standard Error
¹Persons 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?"
²Total may not equal to the sum of children and adults due to rounding and varying missing values.
³The weighted number of survey participants of the intended population group with current asthma divided by the weighted number of all survey participants in the intended population group and then multiply by 100.
⁴NH AI/AN only and NH AI/AN with any other group.
⁵Subcategory includes "Other single and multiple races".
⁶As a subset of Hispanic.
Source: 2019–2021 National Health Interview Survey (NHIS).

National
Prevalence of Asthma Attacks¹ Among Children and Adults With Current Asthma² (2021)

Abbreviations: SE = Standard Error
¹Having had one or more asthma attacks in the past 12 months 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?"
³The weighted number of survey participants of the intended population group who had one or more asthma attacks in the past 12 months among people with current asthma divided by the weighted number of all survey participants in the intended population group and then multiply by 100.
Source: 2021 National Health Interview Survey (NHIS)

Prevalence of Asthma Attacks¹ Among Children and Adults With Current Asthma² by Race, Ethnicity, and Age (2019–2021)

Abbreviations: NH = Non-Hispanic, AI/AN = American Indian/ Alaska Native, SE = Standard Error.
¹Having had one or more asthma attacks in the past 12 months 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?”
³Total may not equal to the sum of children and adults due to rounding and missing values.
⁴The weighted number of survey participants of the intended population group who had one or more asthma attacks in the past 12 months among people with current asthma divided by the weighted number of all survey participants with current asthma in the intended population group and then multiply by 100.
⁵NH AI/AN only and NH AI/AN with any other group combined.
⁶Subcategory includes “Other single and multiple races”.
⁷As a subset of Hispanic.
Source: 2019–2021 National Health Interview Survey (NHIS).

National
Asthma Emergency Department Visits and Hospitalizations Among Children and Adults¹ (2020)

Abbreviation: SE = Standard Error

Notes:
For detailed estimates refer to 2020 Asthma-related Healthcare Use data web tables: https://www.cdc.gov/asthma/national-surveillance-data/healthcare-use.htm.
Note: in 2020 transitioned to using HCUP data to calculate asthma Emergency Department visits
¹Asthma as the primary diagnosis (ICD-10-CM Code: J45).
²Crude rate per 10,000 U.S. Census 2020 population.
³Rate was calculated using the weighted number of visits for children aged 0–17 years divided by the U.S. Census 2020 resident population for children aged 0–17 years and multiplied by 10,000.
⁴Rate was calculated using the weighted number of visits for adults aged 18+ years divided by the U.S. Census 2020 resident population for adults aged 18+ years and multiplied by 10,000.

Data sources:
Emergency department visits: HCUP, Healthcare Cost and Utilization Project, National (Nationwide) Emergency Department Samples (NEDS).
Hospital inpatient stays: HCUP, Healthcare Cost and Utilization Project National (Nationwide) Inpatient Sample (NIS). Agency for Healthcare Research and Quality, Rockville, MD. For more information about HCUP data see https://www.hcup-us.ahrq.gov/.

Asthma Mortality by Select Sociodemographic Characteristics (2021)

Abbreviations: NH = Non-Hispanic, AI/AN = American Indian or Alaska Native, NH/OPI = Native Hawaiian or Other Pacific Islander, SE = Standard Error
¹Numbers within selected characteristics may not sum to total due to rounding and missing values.
²Asthma as the underlying cause of death (ICD-10 codes J45–J46).
³Crude rate of child deaths was calculated using the number of deaths for children aged 0–17 years and dividing it by the U.S. Census 2021 resident population for children aged 0–17 years per 1,000,000.
⁴Crude rate of adult deaths was calculated using the number deaths for adults aged 18+ years divided by the U.S. Census 2021 resident population for adults aged 18+ years per 1,000,000.
⁵Variable includes categories female and male as reported in death certificate.
⁶Rates are unreliable when the number of deaths is less than 20.
⁷Data are suppressed when the number of deaths is 9 or fewer.
⁸Information for Hispanic origin was missing for suppressed number of deaths.
Source:CDC/NCHS, Division of Vital Statistics CDC Wonder