2020 Archived National Asthma Data

National
Prevalence of Asthma Attacks¹ Among People With Current Asthma² by Age (2020)

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?"
Source: 2020 National Health Interview Survey (NHIS)

Prevalence of Asthma Attacks¹ Among People With Current Asthma² by Race and Ethnicity (2018–2020)

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.
⁴Relative standard error of the estimate is 30%–50%; the estimate is unreliable.
⁵AI/AN NH only and AI/AN NH with any other group combined for 2019 and 2020.
⁶Subcategory includes “Other single and multiple races” for 2019 and 2020.
⁷As a subset of Hispanic.
Source: 2018–2020 National Health Interview Survey (NHIS).

National
Health Care Use¹ (2019)

Abbreviation: SE = Standard Error

Notes:
For detailed estimates refer to 2019 Asthma-related Healthcare Use data web tables: https://www.cdc.gov/asthma/national-surveillance-data/healthcare-use.htm.
¹Asthma as the primary diagnosis (ICD-10-CM Code: J45).
²Crude rate per 10,000 population.
³Rate was calculated using the weighted number of visits for children aged 0–17 years divided by the civilian non-institutionalized population (for emergency department visit rate) or resident population (for hospitalization rate) 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 civilian non-institutionalized population (for emergency department visit rate) or resident population (for hospitalization rate) for adults aged 18+ years and multiplied by 10,000.

Data sources:
Emergency department visits: CDC/NCHS. National Hospital Ambulatory Medical Care Survey (NHAMCS). https://www.cdc.gov/nchs/ahcd/about_ahcd.htm.
Hospital inpatient stays: HCUPnet, Healthcare Cost and Utilization Project National (Nationwide) Inpatient Sample (NIS). Agency for Healthcare Research and Quality, Rockville, MD. https://hcupnet.ahrq.gov/. For more information about HCUP data see https://www.hcup-us.ahrq.gov/.

Asthma Mortality (2020)

Abbreviations: NH = Non-Hispanic, AI/AN = American Indian or Alaska Native, 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 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 resident population for adults aged 18+ years per 1,000,000.
⁵Rates are unreliable when the number of deaths is less than 20.
⁶Variable includes categories female and male as reported in death certificate.
⁷Information for Hispanic origin was missing for 17 deaths.
Source: CDC/NCHS, Division of Vital Statistics CDC Wonder