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Short-term effects of air pollutants on hospital admissions for acute bronchitis in children:a multi-city time-series study in Southwest China

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World Journal of Pediatrics 2022年第6期18卷 426-434页

作者： Yi He Wanyanhan Jiang Jia-Qiang Liao Lin Jing Jia Li Lian Yang HEOA Group School of Public HealthChengdu University of Traditional Chinese MedicineNo.1166 Liutai RoadChengdu611137China HEOA Group West China School of Public HealthSichuan UniversityNo.17 People’s South RoadWuhou DistrictChengdu610041China HEOA Group School of ManagementChengdu University of Traditional Chinese MedicineNo.1166 Liutai RoadChengdu611137China

Background Few studies have investigated the effects of air pollutants on children with acute bronchitis.This study aimed to explore the acute effects of four air pollutants[fine particulate matter(PM_(2.5)),inhalable particulate matter(PM10),sulfur dioxide(SO_(2)),and nitrogen dioxide(NO_(2))]on the daily number of children admitted to the hospital for acute bronchitis in Sichuan Province,China.Methods The 49,975 records of hospitalized children with acute bronchitis from medical institutions in nine cities/prefectures,Sichuan Province,China,as well as the simultaneous meteorological data and air pollution data from 183 monitoring sites,were collected from 1 January 2017 to 31 December 2018.A generalized additive model was adopted to analyze the exposure–response and lag effects of hospitalizations of children with acute bronchitis to air pollutants.Stratified analyses were conducted based on sex,age,and season.Results The single-pollutant model showed that a 10µg/m3 increase at lag07 of PM_(2.5),PM10,SO_(2),and NO_(2) corresponded to an increase of 1.23%[95%confidence interval(CI)0.21–2.26%],1.33%(95%CI 0.62–2.05%),23.52%(95%CI 11.52–36.81%),and 12.47%(95%CI 8.46–16.64%)in daily hospitalizations for children with acute bronchitis,respectively.Children aged 0–2 were more prone to PM_(2.5)(P<0.05).Interestingly,the effects were stronger in the warm season than in transition seasons and the cool season for PM_(2.5) and PM10(P<0.05).Conclusion The higher daily average concentrations of four pollutants in Sichuan Province can result in an increased number of children hospitalized for acute bronchitis.

关键词： Acute bronchitis Air pollutants Children time-series study

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The short-term effect of ambient ozone on mortality is modified by temperature in Guangzhou,China

The short-term effect of ambient ozone on mortality is modif...

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作者：刘涛 Tian Tian Li Yong Hui Zhang Yan Jun Xu Xiang Qian Lao Shannon Rutherford Cordia Chu Yuan Luo Qi Zhu Xiao Jun Xu Hui Yan Xie Zhao Rong Liu Wen Jun Ma Guangdong Institute of Public Health Center for Disease Control and Prevention of Guangdong Province Institute of Environmental Health and Related Product Safety Chinese Center for Disease Control and Prevention School of Public Health and Primary Care Faculty of MedicineThe Chinese University of Hong Kong Center for Environment and Population Health School of Public HealthGriffith University College of Environmental Sciences and Engineering Peking University

Effects of ozone on mortality have been widely assessed in developed countries but rarely in developing countries,and the effects of season and temperature on these associations remain unclear.The present study aimed to explore the modifying effects of temperature on the association of ozone with mortality,and to examine the lag effect structure In Guangzhou,China.Daily non-accidental mortality,air pollution and meteorological data from January 1st 2006 to December 31 st 2008 in Guangzhou were collected.Generalized additive models(GAM) and distributed lag models(DLM) were used to estimate the excess risk(ER)of ozone on daily mortality and capture the lag effect structure.Results revealed that,in cold season,an increment in the ozone concentration of 10 μg m was associated with a 0.87%(95%CI:-0.06 to 2.29%) and334%(95%CI:1.36-5.35%) increase of mortality for lagO and lag0-6,respectively.However,no significant effects were observed in the warm season.Daily average temperature and ozone concentration had interactive negative effects on non-accidental mortality in the cold season and at daily average temperatures in the 0—25th percentile,and mortality displacement was also found in these conditions.Therefore,the short-term effect of ambient ozone on mortality is modified by temperature in Guangzhou,China.

关键词： Ambient ozone Non-accidental mortality Lag effect time-series study Mortality displacement

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