Associations of Ambient PM and O with Cardiovascular Mortality: a Time-series Study in Hefei, China

Overview

Journal Int J Biometeorol

Specialty Biophysics

Date 2019 Aug 7

PMID 31385092

Citations 6

Authors

Han Cheng

Furong Zhu

Ruoqian Lei

Chaowei Shen

Jie Liu

Mei Yang

Rui Ding

Jiyu Cao

Affiliations

Soon will be listed here.

Abstract

China is among the countries with the worst air quality throughout the world. As PM was not included in the national air quality monitoring network before January 2013 in China, no study has investigated the associations of ambient PM and O with cardiovascular mortality in Hefei, China. In this time-series analysis, Poisson regression in generalized additive model was adopted to assess the associations between the air pollutants and cardiovascular mortality during the 2013-2015 in Hefei, China. The findings showed that the daily average level of PM and O was 77.8 μg/m and 60.1 μg/m in the study period, respectively. PM and O exposure tended to increase cardiovascular mortality, but the associations were statistically insignificant. Further stratified analyses by seasons showed that with every 10 μg/m increase of PM in the cold season (October-March), the risk of cardiovascular death increased by 0.22% (95% CI 0.05%, 0.39%); while every 10 μg/m increase of O in the warm season (April-September), the risk of cardiovascular death increased by 1.29% (95% CI 0.26%, 2.33%) on Lag0. Interestingly, stratified analysis by gender showed that the associations of PM, but not O exposure, could significantly increase cardiovascular mortality in females, but not males. The findings of this study especially underscored the adverse associations of PM and O exposure with females in specific seasons. More studies are needed to verify our findings and further investigate the underlying mechanisms. Graphical Abstract.

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