Abstract
BACKGROUND: Few studies have investigated effects of air pollution on the incidence of cerebrovascular events.
OBJECTIVES: We assessed the association between long-term exposure to multiple air pollutants and the incidence of stroke in European cohorts.
METHODS: Data from 11 cohorts were collected, and occurrence of a first stroke was evaluated. Individual air pollution exposures were predicted from land-use regression models developed within the European Study of Cohorts for Air Pollution Effects (ESCAPE). The exposures were: PM2.5 [particulate matter (PM) = 2.5 m in diameter], coarse PM (PM between 2.5 and 10 m), PM10 (PM <10 mu m), PM2.5 absorbance, nitrogen oxides, and two traffic indicators. Cohort-specific analyses were conducted using Cox proportional hazards models. Random-effects meta-analysis was used for pooled effect estimation.
RESULTS: A total of 99,446 study participants were included, 3,086 of whom developed stroke. A 5 mu g/m(3) increase in annual PM2.5 exposure was associated with 19% increased risk of incident stroke [hazard ratio (HR) = 1.19, 95% CI: 0.88, 1.62]. Similar findings were obtained for PM10. The results were robust to adjustment for an extensive list of cardiovascular risk factors and noise coexposure. The association with PM2.5 was apparent among those >= 60 years of age (HR = 1.40, 95% CI: 1.05, 1.87), among neversmokers (HR = 1.74, 95% CI: 1.06, 2.88), and among participants with PM2.5 exposure <25 g/m(3) (HR = 1.33, 95% CI: 1.01, 1.77).
CONCLUSIONS: We found suggestive evidence of an association between fine particles and incidence of cerebrovascular events in Europe, even at lower concentrations than set by the current air quality limit value.
Original language | English |
---|---|
Pages (from-to) | 919-925 |
Number of pages | 7 |
Journal | Environmental Health Perspectives |
Volume | 122 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2014 |
Funding
The European Community's Seventh Framework Program (FP7/ 2007-2011) provided funding for this work (grant 211250). For the Finnish part, additional funding came from the Academy of Finland (project number 129317). The four Swedish cohorts [SNAC-K (Swedish National Study on Aging and Care in Kungsholmen), SALT (Screening Across the Lifespan Twin study), 60y (60-year-olds study), SDPP (Stockholm Diabetes Prevention Program study)] were partially funded by the Swedish Environmental Protection Agency, the Swedish Council for Working Life and Social Research, and the Swedish Heart-Lung Foundation. The SALT cohort received additional support from the U.S. National Institutes of Health (grant AG-08724). The 60y cohort received additional support from the Stockholm County Council and the Swedish Research Council (longitudinal research and 0593). The SDPP cohort received additional support from the Stockholm County Council, the Swedish Research Council, the Swedish Diabetes Association, and the Novo Nordisk Scandinavia. The Heinz Nixdorf Foundation, the German Ministry of Education and Science, the German Aerospace Center (Deutsches Zentrum fur Luft-und Raumfahrt), and the German Research Foundation (DFG HO 3314/2-1 and JO170/ 8-1), Bonn, Germany, also provided support for this study. The KORA (German Cooperative Health Research in the Region of Augsburg) research platform and the MONICA (Multinational MONItoring of trends and determinants in CArdiovascular diseases) Augsburg studies were initiated and financed by the Helmholtz Zentrum Munchen, German Research Center for Environmental Health, which is funded by the German Federal Ministry of Education and Research and by the State of Bavaria. The SIDRIA (International Study on Asthma and Allergies in Childhood in Turin and Rome) cohort study was partially funded by the Italian Ministry of Health.
Keywords
- USE REGRESSION-MODELS
- ACUTE ISCHEMIC-STROKE
- PARTICULATE MATTER
- PM2.5 ABSORBENCY
- MORTALITY
- AREAS
- RISK
- NO2
- METAANALYSIS
- PMCOARSE