March 12, 2009
High ozone linked to respiratory deaths
A U.S. study suggests people who live in areas with elevated ground ozone levels have a 30 percent greater risk of death due to respiratory problems.
The research, published in the New England Journal of Medicine, said the issue is not just the effects of high-ozone days but the effects of long-term cumulative exposure, New York University Langone Medical Center said Thursday in a release.
The findings are based on American Cancer Society data that followed 450,000 people from 1982 to 2000.
Riverside, Calif. had the highest mean daily maximum ozone concentration during the 18-year period with 104 ppb. Los Angeles was a close second, with an estimated 43 percent increased risk, the report said.