Effects of air pollutants on circulatory diseases visits in Zhengzhou,Henan province,2013-2019:a time-series study
Objective To understand the effects of air pollutants on circulatory disease visits in Zhengzhou,Henan province.Methods The data on daily visits of patients with circulatory diseases and the air pollutants from October 28,2013 to August 29,2019 were collected.A distributed lag nonlinear model was used to analyze the correlation between air pollutants and circulatory system diseases visits,stratified by gender,age,and season.Results PM2.5,PM10,SO2i,and NO2 demonstrated notable effects on hypertension and coronary heart disease.PM10,SO2,and NO2 affected both men and women.PM2.5 and O3 had a substantial effect on women[PM2.5:RR=1.001%(95%CI:1.000%-1.002%),O3:RR=1.002%(95%CI:1.000%-1.004%)].The effect of CO on men was considerable[CO:RR=1.174%(95%CI:1.001%-1.377%)].On the 19-59 and 60-year-old populations,PM2.5,SO2,and NO2 all had a significant impact.CO only had a substantial effect on the 60-year-old group[CO:RR=1.184%(95%CI:1.000%-1.402%)].Autumn and winter circulatory diseases visits were significantly impacted by PM25[autumn:RR=1.007%(95%CI:1.001%-1.013%),winter:RR=1.004%(95%CI:1.000%-1.007%)],while winter circulatory diseases visits were greatly influenced by PM10 and NO2[PM10:RR=1.005%(95%CI:1.002%-1.008%),NO2:RR=1.012%(95%CI:1.000%-1.023%)].Conclusion The air pollutants have obvious influence on daily visits of patients with circulatory diseases,especially in the people over 60,and in winter.
Air pollutionCirculatory system diseasesNonlinear lagged distribution modelStratified analysis