Objective To analyze the effect of nitrogen dioxide(NO2)on hospital visits for respiratory diseases in Jiax-ing.Methods We collected daily air NO2 monitoring data,meteorological factors and hospital visits for respiratory diseases in Jiaxing from 2019 to 2021.We used Wilcoxon rank sum test and generalized addition model(GAM)to analyze the acute effects of air NO2 on hospital visits for respiratory diseases.Results The average daily concentration of NO2 exceeded the standard for 9 days.The daily hospital visits for respiratory diseases and childhood respiratory diseases on days when air NO2 exceeded the na-tional standard were higher than those on qualified days.In the single-day lag effect analysis,the excess risk(ER)of daily hos-pital visits for respiratory diseases and adult respiratory diseases both reached the maximum on lag4,while the ER of daily hospi-tal visits for childhood respiratory diseases reached the maximum on lag3 with ER(95％CI)being 2.23％(1.52％-2.94％),1.73％(1.06％-2.41％)and 2.73％(1.73％-3.74％)with NO2 concentration increase per 10 μg/m3,respectively.In the cumulative lag effect analysis,the ER of daily hospital visits for respiratory diseases,adult and childhood respiratory diseases all reached the maximum on lag07,with ER(95％CI)being 5.35％(4.06％-6.66％),3.47％(2.25％-4.70％)and 7.17％(5.31％-9.07％)with NO2 concentration increase per 10 µg/m3,respectively.The maximum ER of hospital visits for childhood respiratory diseases was higher than that for adults.Conclusion The increase of NO2 concentration in Jiaxing may lead to an in-crease in hospital visits for respiratory diseases with a lag effect,and the health protection of children's respiratory system should be especially strengthened.
nitrogen dioxiderespiratory diseaseshospital visitWilcoxon rank sum testgeneralized additive model
NETL
NSTL
万方数据
