TY - JOUR
T1 - Associations of outdoor air pollution with hemorrhagic stroke mortality
AU - Yorifuji, Takashi
AU - Kawachi, Ichiro
AU - Sakamoto, Tetsuro
AU - Doi, Hiroyuki
N1 - Funding Information:
The study was funded by a grant for young researchers from Okayama University.
PY - 2011/2
Y1 - 2011/2
N2 - OBJECTIVE: Evidence linking short-term exposure to outdoor air pollution with hemorrhagic stroke is inconsistent. METHODS: We evaluated the associations between outdoor air pollution and specific types of stroke in Tokyo, Japan, from April 2003 to December 2008. We obtained daily counts of stroke mortality (n = 41,440) and concentrations of nitrogen dioxide as well as particles less than 2.5 μm in diameter. Time-series analysis was employed. RESULTS: Although same-day air pollutants were positively associated with ischemic stroke and intracerebral hemorrhage mortality, both air pollutants were more strongly associated with subarachnoid hemorrhage mortality: rate ratio was 1.041 (95% confidence interval: 1.011-1.072) for each 10 μg/m increase in the previous-day particles less than 2.5 μm. CONCLUSIONS: This study suggests that short-term exposure to outdoor air pollution increases the risks of hemorrhagic stroke mortality as well as ischemic stroke mortality.
AB - OBJECTIVE: Evidence linking short-term exposure to outdoor air pollution with hemorrhagic stroke is inconsistent. METHODS: We evaluated the associations between outdoor air pollution and specific types of stroke in Tokyo, Japan, from April 2003 to December 2008. We obtained daily counts of stroke mortality (n = 41,440) and concentrations of nitrogen dioxide as well as particles less than 2.5 μm in diameter. Time-series analysis was employed. RESULTS: Although same-day air pollutants were positively associated with ischemic stroke and intracerebral hemorrhage mortality, both air pollutants were more strongly associated with subarachnoid hemorrhage mortality: rate ratio was 1.041 (95% confidence interval: 1.011-1.072) for each 10 μg/m increase in the previous-day particles less than 2.5 μm. CONCLUSIONS: This study suggests that short-term exposure to outdoor air pollution increases the risks of hemorrhagic stroke mortality as well as ischemic stroke mortality.
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U2 - 10.1097/JOM.0b013e3182099175
DO - 10.1097/JOM.0b013e3182099175
M3 - Article
C2 - 21270652
AN - SCOPUS:79952185672
SN - 1076-2752
VL - 53
SP - 124
EP - 126
JO - Journal of Occupational and Environmental Medicine
JF - Journal of Occupational and Environmental Medicine
IS - 2
ER -
