Years of Air Pollution May Be Tied to Uncontrolled
TUESDAY, June 21 (HealthDay News) -- A strong association exists
between long-term exposure to air pollution and uncontrolled
asthma, new research indicates.
The study included 481 adults with asthma who provided details
about their respiratory health between 2003 and 2007. The
researchers compared this information with levels of three types of
air pollution -- ozone (O3), nitrous oxide (NO2) and particulate
matter (PM10) -- in the five cities in France where the
About 44 percent of the participants had well-controlled asthma,
29 percent had partially controlled asthma and 27 percent had
uncontrolled asthma. Women and older people were more likely to
have uncontrolled asthma.
There was a strong association between poorer asthma control and
levels of ozone and particulate matter. The risk of uncontrolled
asthma was 69 percent higher among those with long-term exposure to
ozone and 35 percent higher for those with long-term exposure to
The study appears online June 21 in the
Journal of Epidemiology and Community Health.
"Our results indicate that both ambient O3 and PM10 concentrations jeopardize asthma control in adults," the researchers concluded in a journal news release. "Our results are robust."
The U.S. National Heart, Lung, and Blood Institute has more
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