Abstract
Purpose
The aim of this study is to determine whether short-term exposure to fine particulate matter (PM2.5) is associated with emergency ambulance dispatches for cardiovascular diseases in Japan.
Methods
The nationwide data on emergency dispatches of ambulance for cardiovascular diseases classified as I00–I99 by International Classification of Diseases-10th revision in 30 Japanese prefectures between April 1 and December 31, in 2010 were analyzed. Data on weather variability including PM2.5, temperature and relative humidity were acquired from ambient air pollution monitoring stations. Conditional Poisson regression models were used to estimate the prefecture-specific effects of PM2.5 on morbidity, and adjust for confounding factors. A meta-analysis was then applied to pool estimates at the 30-prefecture level.
Results
A total of 160,566 emergency ambulance dispatches for cardiovascular diseases were reported during the study period. The risk of emergency ambulance dispatch for cardiovascular diseases significantly increased with an increase in the exposure to PM2.5 in Fukuoka and Iwate Prefectures. However, we found no statistically significant associations between PM2.5 and emergency ambulance dispatches in the pooled analysis (odds ratio 1.00, 95 % confidence interval 0.99–1.00). Heterogeneity was not observed between prefectures (Cochran Q test, p = 0.187, I 2 = 18.4 %).
Conclusions
Exposure to PM2.5 is not associated with overall emergency ambulance dispatches for cardiovascular diseases in Japan.
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Toshihiro Ichiki and Daisuke Onozuka authors are equally contributed to this work.
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Ichiki, T., Onozuka, D., Kamouchi, M. et al. An association between fine particulate matter (PM2.5) levels and emergency ambulance dispatches for cardiovascular diseases in Japan. Int Arch Occup Environ Health 89, 1329–1335 (2016). https://doi.org/10.1007/s00420-016-1168-9
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DOI: https://doi.org/10.1007/s00420-016-1168-9