AsthmaStats provides national and state level estimates among children and adults on asthma-related specific topics using data from National Center for Health Statistics (NCHS) surveys, the Vital Statistics System, and the BRFSS Asthma Call-back Survey (ACBS).

New AsthmaStats
Line graph showing asthma emergency department (ED) visits rate per 10,000 population by age group and year: US, 2010-2018
Asthma emergency department (ED) visits 2010–2018

Asthma emergency department (ED) visits rate* (per 10,000 population) by age group† and year: United States, 2010–2018.

The emergency department (ED) is an important place for patients to seek immediate care for asthma exacerbations. It may also be the main place of care for some patients who do not have a medical home or a primary care provider. The asthma ED visits rate with a primary diagnosis of asthma (per 10,000 population) for adults (trend slope p-value=0.42), for children (trend slope p-value=0.43), or for all ages (trend slope p-value=0.25) did not change significantly from 2010 through 2018 (Figure).

Prior AsthmaStats


Asthma-related physician office rates among children declined from 2010 to 2016.


Nearly half the people with current asthma had one or more asthma attacks in the past 12 months.


The rate of physician office visits with asthma as the first-listed diagnosis was 304.4 per 10,000 persons.


More adults with asthma than adults without asthma reported having a flu vaccine.


More adults with asthma than adults without asthma have fair or poor health.


Children who have asthma use a hospital emergency department as their usual place for medical care more than other children.


The percent of children with asthma who reported one or more missed school days in 2013 was significantly lower than in 2003.


Asthma severity determines type and duration of treatment.


Frequent use of quick-relief may indicate inadequate asthma control


Obesity is associated significantly with the development of asthma, worsening asthma symptoms, and poor asthma control. This leads to increase medication use and hospitalizations.


Nearly 17% of people without asthma smoke. But surprisingly, even more people with asthma smoke. About 21% of people with asthma smoke, even though cigarette smoke is known to trigger asthma attacks.


More than 60% of adults with current asthma had uncontrolled asthma


Fifty percent of children with current asthma had uncontrolled asthma.


Asthma deaths have decreased over time and varied by demographic characteristics.


Flu vaccination among children with asthma varied by age.


Children with asthma were more likely than children without asthma to visit a health care provider(s) 3 or more times during the past 12 months.


More children with asthma than children without asthma had health care coverage through Medicaid or the Children’s Health Insurance Program (CHIP).


Asthma severity determines type and duration of treatment.


Uncontrolled asthma is associated with decreased quality of life and increased health care system use.


Using long-term control medications daily helps prevent symptoms.


Insurance coverage reduces, but does not eliminate, cost barriers for asthma care.
Page last reviewed: April 9, 2021