Association between air pollution and the number of emergency visits for acute upper respiratory infections in Hefei city, Anhui, 2016-2020
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摘要:
目的 探讨合肥市大气污染物与急性上呼吸道感染急诊间的关系。 方法 收集2016年1月1日-2020年12月31日于安徽医科大学第一附属医院急诊就诊的急性上呼吸道感染患者的病例资料、同期的气象数据和大气污染物数据, 采用分布滞后非线性模型, 控制气象因素、星期几效应、节假日效应等混杂因素, 分析大气污染物暴露对急性上呼吸道感染急诊量的影响, 并对性别、年龄进行分层研究。 结果 2016-2020年合肥市急性上呼吸道感染总急诊量为55 902人, 且冷季高于暖季。在所有污染物中, SO2对急性上呼吸道感染影响最大, 在lag07时其滞后效应达到最大, RR及95%CI为1.194(1.072~1.330)。同时, 气态污染物(如SO2、NO2)的RR估计值大于颗粒物(如PM2.5、PM10)的RR估计值。性别分层发现, SO2、NO2对女性急诊量的影响更大, PM2.5、PM10、O3对男性急诊量的影响更大。年龄分层发现, PM2.5、PM10、NO2对>65岁人群急诊量的影响更大, SO2对18~65岁人群急诊量影响更大。 结论 合肥市大气污染物浓度升高会增加急性上呼吸道感染急诊就诊风险, 且对不同性别、年龄影响不同。 Abstract:Objective To evaluate the association between air pollutants and acute upper respiratory tract infections (AURTI) in the emergency department of Hefei City. Methods Emergency hospital visits for AURTI in public hospitals in Hefei from January 1, 2016 to December 31, 2020, meteorological data and air pollutants data for the same period were collected for the study.After controlling for confounding factors such as meteorological factors, day-of-week effects and holiday effects, the distribution lag nonlinear model was used to quantify the association between daily air pollutants and daily emergency visits.The results were then stratified by gender and age. Results The total number of AURTI emergency department visits in Hefei from 2016 to 2020 was 55 902, and it is higher in the cold season than in the warm season.Among all pollutants, SO2 had the greatest effect on AURTI, with its lag effect reaching a maximum at lag07, with a RR and 95%CI of 1.194(1.072-1.330).The relative risks (RR) of gaseous pollutants (SO2, NO2) were higher than those of particulate matter (PM2.5, PM10).Gender stratification showed that females seemed to be more vulnerable to exposure to SO2 and NO2, while males were more vulnerable to PM2.5, PM10 and O3.In the age stratification, people aged >65 years were more sensitive to PM2.5, PM10 and NO2, people aged 18-65 years were more sensitive to SO2. Conclusion Elevated concentrations of air pollutants in Hefei all increased the risk of emergency admissions for AURTI, with different patterns of effects by gender and age. -
表 1 2016—2020年合肥市大气污染物、气象因素和急性上呼吸道感染急诊量
Table 1. Air pollutants, meteorological factors, and emergency visits for acute upper respiratory infections in Hefei City from 2016 to 2020
项目 最小值 M(P25, P75) 最大值 大气污染物 PM2.5(μg/m3) 5.0 40.0(27.0, 61.0) 235.0 PM10(μg/m3) 11.0 70.0(48.0, 97.0) 322.0 SO2(μg/m3) 2.0 9.0(5.0, 12.0) 58.0 NO2(μg/m3) 10.0 39.0(29.0, 55.0) 139.0 CO(mg/m3) 0.3 0.8(0.6, 1.0) 2.8 O3(μg/m3) 6.0 109.0(75.0, 146.0) 309.0 气象因素 平均温度(℃) -5.9 17.3(8.6, 24.6) 35.6 湿度(%) 33.0 78.0(69.0, 86.0) 99.0 气压(hPa) 987.5 1 012.0(1 003.4, 1 019.3) 1 041.4 急性上呼吸道感染急诊量(人次/d) 总急诊量 0 27(18, 40) 141 男性 0 15(9, 22) 75 女性 0 12(8, 19) 68 0~17岁 0 22(14, 33) 123 18~65岁 0 4(2, 7) 42 >65岁 0 0(0, 0) 3 表 2 2016—2020年合肥市大气污染物、气象因素及急性上呼吸道感染急诊量的相关性分析
Table 2. Correlation analysis of air pollutants, meteorological factors, and acute upper respiratory infection emergency visits in Hefei from 2016 to 2020
指标 PM2.5 PM10 SO2 NO2 CO O3 温度 气压 湿度 PM10 0.786a SO2 0.528a 0.589a NO2 0.571a 0.682a 0.536a CO 0.840a 0.664a 0.565a 0.618a O3 -0.149 0.146 -0.018 -0.027 -0.156 温度 -0.475a -0.221a -0.236a -0.323a -0.348a 0.645a 气压 0.439a 0.264a 0.336a 0.381a 0.345a -0.539a -0.546a 湿度 -0.142 -0.349a -0.315a -0.235a -0.015 -0.279a 0.034 -0.208a 总急诊量 0.215a 0.142 -0.077 0.154 0.191 -0.043 -0.151 0.089 0.010 注:aP < 0.05。 表 3 最强滞后时间下大气污染物对不同性别、年龄急性上呼吸道感染急诊量的影响[RR(95% CI)]
Table 3. Impact of air pollutants on emergency visits for acute upper respiratory infections by gender and age under maximum lag time [RR(95% CI)]
项目 PM2.5(lag07) PM10(lag07) SO2(lag07) NO2(lag07) CO(lag07) O3(lag01) 总急诊量 1.044(1.027~1.060)a 1.029(1.018~1.040)a 1.194(1.072~1.330)a 1.060(1.037~1.085)a 1.048(1.013~1.084)a 1.009(1.004~1.014)a 男性 1.044(1.026~1.063)a 1.029(1.017~1.042)a 1.143(1.010~1.294)a 1.057(1.030~1.084)a 1.061(1.021~1.103)a 1.010(1.004~1.017)a 女性 1.042(1.024~1.061)a 1.028(1.016~1.041)a 1.258(1.112~1.423)a 1.065(1.038~1.093)a 1.034(0.995~1.075) 1.007(1.001~1.014)a 0~17岁 1.039(1.022~1.057)a 1.028(1.017~1.040)a 1.176(1.046~1.322)a 1.058(1.032~1.084)a 1.048(1.011~1.087)a 1.009(1.003~1.015)a 18~65岁 1.057(1.031~1.084)a 1.027(1.009~1.045)a 1.260(1.061~1.496)a 1.071(1.033~1.110)a 1.040(0.984~1.099) 1.008(0.999~1.017) >65岁 1.138(1.014~1.278)a 1.101(1.008~1.204)a 1.352(0.600~3.045) 1.214(1.011~1.457)a 0.965(0.733~1.268) 1.014(0.966~1.064) 注:aP < 0.05。 表 4 不同时间自由度下模型的稳定性[RR(95% CI)]
Table 4. Stability of the model at different degrees of freedom [RR(95% CI)]
df PM2.5(lag07) PM10(lag07) SO2(lag07) NO2(lag07) CO(lag07) O3(lag01) 6 1.049(1.033~1.065)a 1.037(1.027~1.046)a 1.279(1.159~1.413)a 1.078(1.056~1.100)a 1.048(1.014~1.082)a 1.011(1.005~1.016)a 7 1.044(1.027~1.060)a 1.029(1.018~1.040)a 1.194(1.072~1.330)a 1.060(1.037~1.085)a 1.048(1.013~1.084)a 1.009(1.004~1.014)a 8 1.043(1.026~1.059)a 1.030(1.019~1.041)a 1.188(1.066~1.324)a 1.060(1.036~1.086)a 1.045(1.010~1.081)a 1.008(1.003~1.014)a 注:aP < 0.05。 -
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