Chronic Exposure to Ambient Ozone and Asthma Hospital Admissions among Children

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Abstract
BackgroundThe association between chronic exposure to air pollution and adverse health outcomes has not been well studied.ObjectiveThis project investigated the impact of chronic exposure to high ozone levels on childhood asthma admissions in New York State.MethodsWe followed a birth cohort born in New York State during 1995–1999 to first asthma admission or until 31 December 2000. We identified births and asthma admissions through the New York State Integrated Child Health Information System and linked these data with ambient ozone data (8-hr maximum) from the New York State Department of Environmental Conservation. We defined chronic ozone exposure using three indicators: mean concentration during the follow-up period, mean concentration during the ozone season, and proportion of follow-up days with ozone levels > 70 ppb. We performed logistic regression analysis to adjust for child’s age, sex, birth weight, and gestational age; maternal race/ethnicity, age, education, insurance status, smoking during p...

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