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Relationship between fine particulate matter, weather condition and daily non-accidental mortality in Shanghai, China: A Bayesian approach
Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
Division of Vital Statistics, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China; Department of Environmental Health, School of Public Health, Fudan University, Shanghai, China.
Division of Vital Statistics, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China.
Institute of Health Information, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China.
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2017 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 12, no 11, e0187933Article in journal (Refereed) Published
Abstract [en]

There are concerns that the reported association of ambient fine particulate matter (PM2.5) with mortality might be a mixture of PM2.5 and weather conditions. We evaluated the effects of extreme weather conditions and weather types on mortality as well as their interactions with PM2.5 concentrations in a time series study. Daily non-accidental deaths, individual demographic information, daily average PM2.5 concentrations and meteorological data between 2012 and 2014 were obtained from Shanghai, China. Days with extreme weather conditions were identified. Six synoptic weather types (SWTs) were generated. The generalized additive model was set up to link the mortality with PM2.5 and weather conditions. Parameter estimation was based on Bayesian methods using both the Jeffreys' prior and an informative normal prior in a sensitivity analysis. We estimate the percent increase in non-accidental mortality per 10 mu g/m(3) increase in PM2.5 concentration and constructed corresponding 95% credible interval (CrI). In total, 336,379 non-accidental deaths occurred during the study period. Average daily deaths were 307. The results indicated that per 10 mu g/m(3) increase in daily average PM2.5 concentration alone corresponded to 0.26-0.35% increase in daily non-accidental mortality in Shanghai. Statistically significant positive associations between PM2.5 and mortality were found for favorable SWTs when considering the interaction between PM2.5 and SWTs. The greatest effect was found in hot dry SWT (percent increase = 1.28, 95% CrI: 0.72, 1.83), followed by warm humid SWT (percent increase = 0.64, 95% CrI: 0.15, 1.13). The effect of PM2.5 on non-accidental mortality differed under specific extreme weather conditions and SWTs. Environmental policies and actions should take into account the interrelationship between the two hazardous exposures.

Place, publisher, year, edition, pages
Public Library of Science , 2017. Vol. 12, no 11, e0187933
National Category
Occupational Health and Environmental Health
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URN: urn:nbn:se:oru:diva-62900DOI: 10.1371/journal.pone.0187933ISI: 000414769900098PubMedID: 29121092OAI: oai:DiVA.org:oru-62900DiVA: diva2:1161847
Note

Funding Agency:

Karolinska Institutet  C62400032  C62412022

Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2018-01-13Bibliographically approved

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