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Estimation of Short-Term Effects of Air Pollution on Stroke Hospital Admissions in Wuhan, China

Xiang, H and Mertz, KJ and Arena, VC and Brink, LL and Xu, X and Bi, Y and Talbott, EO (2013) Estimation of Short-Term Effects of Air Pollution on Stroke Hospital Admissions in Wuhan, China. PLoS ONE, 8 (4).

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Background and Objective:High concentrations of air pollutants have been linked to increased incidence of stroke in North America and Europe but not yet assessed in mainland China. The aim of this study is to evaluate the association between stroke hospitalization and short-term elevation of air pollutants in Wuhan, China.Methods:Daily mean NO2, SO2 and PM10 levels, temperature and humidity were obtained from 2006 through 2008. Data on stroke hospitalizations (ICD 10: I60-I69) at four hospitals in Wuhan were obtained for the same period. A time-stratified case-crossover design was performed by season (April-September and October-March) to assess effects of pollutants on stroke hospital admissions.Results:Pollution levels were higher in October-March with averages of 136.1 μg/m3 for PM10, 63.6 μg/m3 for NO2 and 71.0 μg/m3 for SO2 than in April-September when averages were 102.0 μg/m3, 41.7 μg/m3 and 41.7 μg/m3, respectively (p<.001). During the cold season, every 10 μg/m3 increase in NO2 was associated with a 2.9% (95%C.I. 1.2%-4.6%) increase in stroke admissions on the same day. Every 10 ug/m3 increase in PM10 daily concentration was significantly associated with an approximate 1% (95% C.I. 0.1%-1.4%) increase in stroke hospitalization. A two-pollutant model indicated that NO2 was associated with stroke admissions when controlling for PM10. During the warm season, no significant associations were noted for any of the pollutants.Conclusions:Exposure to NO2 is significantly associated with stroke hospitalizations during the cold season in Wuhan, China when pollution levels are 50% greater than in the warm season. Larger and multi-center studies in Chinese cities are warranted to validate our findings. © 2013 Xiang et al.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Xiang, H
Mertz, KJkjm40@pitt.eduKJM40
Arena, VCarena@pitt.eduARENA0000-0002-1634-7207
Brink, LLllb38@pitt.eduLLB38
Xu, X
Bi, Y
Talbott, EOeot1@pitt.eduEOT1
ContributionContributors NameEmailPitt UsernameORCID
Date: 12 April 2013
Date Type: Publication
Journal or Publication Title: PLoS ONE
Volume: 8
Number: 4
DOI or Unique Handle: 10.1371/journal.pone.0061168
Schools and Programs: Graduate School of Public Health > Biostatistics
Graduate School of Public Health > Epidemiology
Refereed: Yes
Date Deposited: 03 May 2013 21:01
Last Modified: 22 Jun 2021 14:55


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