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Asthma Rates on the Rise in U.S.

CDC Study Shows 24.6 Million Americans Have Asthma
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WebMD Health News
Reviewed by Laura J. Martin, MD

May 3, 2011 -- The number of people with asthma has been rising in recent years, but CDC researchers say in a new report that they aren’t sure why.

The CDC says that the number of people diagnosed with asthma grew by 4.3 million between 2001 and 2009, when one in 12 Americans were told they had the lung disease. The proportion of people of all ages with asthma in the U.S. increased from 7.3% (20.3 million people) in 2001 to 8.2% (24.6 million people) in 2009.

Costs are rising too, from $53 billion in 2002 to about $56 billion in 2007, for a 6% increase.

“Despite the fact that outdoor air quality has improved, we’ve reduced two common asthma triggers -- secondhand smoke and smoking in general -- asthma is increasing,’’ says Paul Garbe, DVM, MPH, chief of the CDC’s air pollution and respiratory health branch, in a news release. “While we don’t know the cause of the increase, our top priority is getting people to manage their symptoms better.”

Part of the reason, Garbe says, could be better diagnostic methods now in use.

CDC Director Thomas R. Frieden, MD, MPH, says in the news release that asthma is a lifelong disease that kills thousands of people annually and adds billions to the nation’s health care costs.

“We have to do a better job educating people about managing their symptoms and how to correctly use medicines to control asthma so they can live longer, more productive lives, while saving health care costs,” he says.

Preventing and Controlling Asthma

Garbe and Ileana Arias, PhD, principal deputy director of the CDC, spoke at a news briefing after the release an article on asthma in Vital Signs, a report that appears on the first Tuesday of the month as part of the agency’s Morbidity and Mortality Weekly Report.

Both scientists cautioned that asthma incidence is increasing and said that people need to do all they can, such as keeping homes clean and avoiding pollution when possible, to prevent asthma attacks.

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