Effect of air pollution on mortality among residents in Hangzhou City / 预防医学

ABSTRACT

Objective@#To examine the effects of air pollution on overall mortality, mortality of respiratory diseases, and mortality of circulatory diseases among residents in Hangzhou City.@*Methods@#Residents' mortality data in Hangzhou City from 2014 to 2016 were captured from Zhejiang Provincial Chronic Disease Surveillance Information Management System, and the ambient air quality in Hangzhou City from 2014 to 2016 were collected from Hangzhou Environmental Monitoring Center, while the meteorological monitoring data during the study period were collected from Hangzhou Meteorological Bureau. The effects of PM2.5, PM10, NO2 and SO2 on overall mortality, morality of respiratory diseases and mortality of circulatory diseases were evaluated a generalized additive model (GAM) based on Poisson distribution, and the risk of mortality was described with excess risk (ER) and its 95%CI.@*Results@#The daily M (QR) overall deaths, deaths from respiratory diseases and deaths from circulatory diseases were 111 (30), 16 (9) and 37 (14) persons in Hangzhou City from 2014 to 2016, respectively. A 10 μg/m3 increase in PM2.5, PM10, NO2 and SO2 resulted in 0.47% (95%CI 0.23%-0.70%), 0.37% (95%CI 0.21%-0.53%), 1.06% (95%CI 0.50%-1.61%) and 3.08% (95%CI 2.18%-3.99%) rises in the risk of overall mortality, 0.60% (95%CI 0.04%-1.16%), 0.45% (95%CI 0.06%-0.83%), 2.01% (95%CI 0.84%-3.20%) and 6.06% (95%CI 3.80%-8.37%) rises in the risk of mortality of respiratory diseases, and 0.45% (95%CI 0.08%-0.83%), 0.44% (95%CI 0.17%-0.71%), 1.43% (95%CI 0.49%-2.37%) and 3.66% (95%CI 2.13%-5.22%) rises in the risk of mortality of circulatory diseases, and the greatest effect was observed at a 2-day lag. Multi-pollutant model analysis showed that, after adjustment for PM2.5, NO2 and PM2.5+NO2+SO2, a 10 μg/m3 increase in SO2 resulted in an elevated risk of mortality of respiratory diseases than a single-pollutant model.@*Conclusions@#The air pollutants PM10, PM2.5, NO2, and SO2 correlated positively with the risk of overall mortality, mortality of respiratory diseases and mortality of circulatory diseases in Hangzhou City from 2014 to 2016, and the co-existence of multiple pollutants enhanced the effect of SO2 on mortality of respiratory diseases.