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QuickStats: Percentage of Persons With Current Asthma* Who Used Inhaled Medication During the Preceding 3 Months, by Medication Type and Symptom Severity Level --- United States, 2003

* Persons with current asthma were respondents who reported ever being told by a medical professional that they had asthma and who still had asthma.

The frequency of symptoms and degree of activity limitation were used to classify those with current asthma into four symptom severity groups. Levels are defined by the National Asthma Education and Prevention Program in Guidelines for the Diagnosis and Management of Asthma (available at

In 2003, approximately two thirds of persons with current asthma used one or more inhaled medications during the preceding 3 months, and the proportion using inhaled medications increased with levels of symptom severity. Approximately half of all respondents with asthma used a B2A-S rescue inhaler, one third used an inhaled corticosteroid, and one fifth used a B2A-L inhaler. Each symptom severity level had a similar pattern of inhaled medication use.

SOURCE: 2003 National Asthma Survey. Available at

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