Objective
To assess the correlation between air pollutants and cardio-cerebrovascular mortality (CCM) in Nanjing.
Methods
Daily average concentrations of crude particles (PM10), fine particles (PM2.5), nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), and ozone (O3), meteorological factors (including air pressure, temperature, and relative humidity), and daily cardiovascular and cerebrovascular deaths during 2013-2016 in Nanjing were collected to analyze the relationship between PM2.5 concentration and CCM by time-series analysis.
Results
The average concentrations of PM10, PM2.5, NO2, CO, SO2, and O3 were 106.1, 62.1, 45.6, 1.0, 25.1, and 86.0 μg/m3, respectively.The results of PM10, PM2.5, and NO2 exceeded the national ClassⅡ standard stipulated by Ambient air quality standard (GB 3095-2012).In single pollutant model, an increase of 10 μg/m3 in PM2.5 concentration raised CCM risk by 0.293% (95% CI:0.016%-0.569%).As for two-pollutant model, when entering other pollutants, the association of PM2.5 with CCM disappeared (P>0.05).
Conclusion
PM2.5 may increase the CCM risk in Nanjing.
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