Effects analysis and excess risk assessment on O3 related emergency calls in Jinan City,2013-2019
Objective To explore the effect of Ozone(O3)exposure on the risk of excess emergency calls of residents in Jinan City from 2013 to 2019.Methods The daily emergency calling event information of residents,as well as the average concentration of air pollutants(O3,PM25,PM10,NO2,SO2,CO)and meteorological factors(daily average temperature,average relative humidity and average wind speed)in Jinan City from January 1st to December 31st of 2013 to 2019,were collected.The case-cross design method was used to determine the expose-response relationship coefficient,which was introduced into the proportional risk model for health risk assessment.Further,stratified analysis was conducted by respiratory system diseases,circulatory system diseases and neurological diseases,and the differences in excess emergency call risk caused by O3 exposure in different seasons were compared.Results There were 653 473 emergency call incidents in Jinan from 2013 to 2019,and average daily emergency calls volume were 250.Impact analysis and excess risk assessment on total emergency calls found that for every 10 μg/m3 increase in O3 concentration,the risk of emergency calls increased by 0.375％(95％CI:0.288％-0.461％),resulting in excess emergency calls of 7 226.Disease-stratified analyses found that the effect estimate of O3 exposure on emergency calls was statistically significant only for neurologic disorders during the study period,with a corresponding effect estimate of 0.471％(95％CI:0.250％-0.692％),and resulted in excess emergency calls of 1 371.In addition,the excess emergency calls caused by O3 exposure had seasonal differences,which were higher in summer and autumn than in winter and spring.Conclusions In Jinan City,exposure of O3 increases the risk of excess emergency calls of residents,and manifests as higher in summer and autumn than in winter and spring.Especially,neurological diseases are significantly affected.
NETL
NSTL
万方数据
