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Long-term exposure to ozone may increase risk of dying

www.lungchicago.org
Adults with long-term exposure to ozone (O3) face an increased risk of dying from respiratory and cardiovascular diseases, according to the study "Long-Term Ozone Exposure and Mortality in a Large Prospective Study" published online ahead of print in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

Using data from a large U.S. study begun in 1982, researchers found that every additional 10 parts per billion (ppb) in long-term ozone exposure increased the risk of dying by:

12 percent from lung disease.
3 percent from cardiovascular disease.
2 percent from all causes.
Researchers said the increased risk of death was highest for diabetes (16 percent), followed by dysrhythmias, heart failure and cardiac arrest (15 percent) and by COPD (14 percent).

"About 130 million people are living in areas that exceed the National Ambient Air Quality standard," said Michael Jerrett, PhD, chair of environmental health sciences at UCLA and study co-author. "While ozone has decreased in the U.S., the reductions are not nearly as big as decreases in other pollutants, and elsewhere in the world, ozone is a growing problem."

The authors analyzed data from nearly 670,000 records in the American Cancer Society Cancer Prevention Study (CPS-II). Begun in 1982, the study enrolled participants from all 50 states; the average age at enrollment was 55. The researchers matched cause of death over 22 years with U.S. Environmental Protection Agency and Centers for Disease Control air quality data. During that time, more than 237,000 participants died.

Researchers took into account fine particulate (PM2.5) pollution, an established cause of premature mortality, and nitrogen dioxide (NO2) pollution, which has been linked to premature mortality. They adjusted for 29 behavioral and demographic factors, including smoking, alcohol use, body weight, occupational exposures, diet, poverty and race.


Thu, 11 Feb 2016 00:00 CST




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