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Estimation of Short-Term Effects of Air Pollution on Stroke Hospital Admissions in Southern Sweden.

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Author

Summary, in English

Background: Short-term exposure to high levels of air pollution can increase stroke risk. In this study we investigated the short-term effects of air pollution on hospital admissions for stroke in a setting where pollutant levels are rather low. We also addressed methodological issues in evaluating the short-term effects of air pollution. Methods: Daily admissions of ischemic (n = 11,267) and hemorrhagic (n = 1,681) stroke were obtained from a Swedish quality register for stroke, Riks-Stroke. We used two types of exposure data: (1) daily measured background levels of ozone, temperature and particles with a diameter <10 mum (PM(10)) and (2) modeled levels of a mixture of NO and NO(2) (NO(x)) at the residential address of each individual. Results: We estimated a 13% (95% confidence interval, 4-22%) increased risk for hospital admissions for ischemic stroke for levels of PM(10) above 30 mug/m(3) compared to <15 mug/m(3), whereas temperature above 16 degrees C decreased the risk. No consistent associations were found for hemorrhagic stroke or for ischemic stroke and ozone or NO(x). Conclusion: Particulate air pollution and temperature seemed to be associated with ischemic stroke hospital admissions. Individual exposure modeling facilitates a detailed exposure assessment but may also be more prone to misclassification errors. The time series and case crossover approaches yielded similar effect estimates.

Publishing year

2010

Language

English

Pages

131-142

Publication/Series

Neuroepidemiology

Volume

34

Issue

3

Document type

Journal article

Publisher

Karger

Topic

  • Environmental Health and Occupational Health

Status

Published

ISBN/ISSN/Other

  • ISSN: 1423-0208