Association between PM2.5 pollution in ambient air and cardio-cerebrovascular mortality in Suzhou in 2016: a time series analysis
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摘要:
目的 探讨苏州市PM2.5对居民心脑血管疾病死亡的影响。 方法 收集2016年1月1日~2017年12月31日苏州市居民人群死亡数据、大气污染物的数据、气象资料,采用广义相加泊松回归模型分析PM2.5与居民每日心脑血管疾病死亡人数之间的关系,计算PM2.5质量浓度每上升一个四分位数间距(interquartile range,IQR)的相对危险度(relative risk,RR值)及其95%可信区间。 结果 2016-2017年苏州市居民因心脑血管疾病死亡总人数为30 200人,平均为41例/d。PM2.5的日均中位浓度为37.13 μg/m3,IQR为30.75 μg/m3。在最佳滞后条件下,PM2.5浓度每上升一个IQR,苏州市居民心脑血管疾病单日死亡效应和平均死亡效应RR值分别为1.017(1.001~1.034)和1.055(1.019~1.093)。分层分析结果显示,女性和>65岁老年人群的心脑血管疾病的死亡风险更高。 结论 苏州市PM2.5浓度的升高可能引起人群心脑血管疾病死亡风险的增加。 Abstract:Objective To explore the effect of PM2.5 on the mortality of cardio-cerebrovascular disease in Suzhou, China. Methods The death data, air pollutant data and meteorological data from January 1, 2016 to December 31, 2017 in Suzhou were collected. The general additive Poisson regression model was used to analyse the association of exposure to PM2.5 with the daily deaths due to cardio-cerebrovascular disease, and to calculate the relative risk (RR) and 95% confidence intervals (95%CI) for an interquartile range (IQR) increase in PM2.5. Results The number of deaths from cardio-cerebrovascular disease was 30 200. On average, there were approximately 41 deaths per day. The daily median concentration of PM2.5 was 37.13 μg/m3 and IQR was 30.75 μg/m3. The RR values of single-day death and average death from cardio-cerebrovascular disease were 1.017(1.001-1.034) and 1.055(1.019-1.093)with an IQR increase of PM2.5 concentration, respectively. Stratified by gender and age, female and the elderly aged over 65 had higher risks of death from the cardio-cerebrovascular disease. Conclusion The elevated level of ambient PM2.5 was positively associated with the increase of mortality of cardio-cerebrovascular disease. -
Key words:
- PM2.5 /
- Cardio-cerebrovascular disease /
- Ischemic heart disease /
- Mortality
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表 1 2016-2017年心脑血管疾病每日死亡数、气象因素以及大气污染水平
Table 1. Daily death from cardio-cerebrovascular disease, meteorological factors and air pollution levels in Suzhou from 2016 to 2017
M Q1 Q3 Min Max 每日死亡人数(人) 40.00 33.00 48.00 18.00 76.00 大气污染物浓度(μg/m3) PM2.5 37.13 24.88 55.63 6.71 206.00 PM10 60.00 43.50 85.29 10.63 278.38 SO2 14.00 10.38 18.00 5.75 39.00 NO2 44.00 33.75 57.50 12.25 118.13 CO(mg/m3) 0.84 0.69 1.04 0.36 2.11 O3 89.25 64.75 133.38 6.63 246.50 气象因素 日均温度(℃) 18.83 10.60 24.85 -4.53 35.70 日均相对湿度(%) 74.00 64.00 83.33 39.67 96.67 日均气压(hPa) 1 018.00 1 010.80 1 024.70 997.90 1 041.75 日均风速(m/s) 1.70 1.20 2.50 0.40 7.70 表 2 心脑血管疾病死亡特征分布
Table 2. Age and sex distribution of death from cardio-cerebrovascular disease
病例数(N=30 200) 百分比(%) 性别 男 14 589 48.31 女 15 611 51.69 年龄(岁) <65 2 377 7.87 ≥65 27 823 92.13 表 3 大气污染物与气象因素的Spearman相关系数
Table 3. Spearman correlations between air pollution and meteorological factors
大气污染物(μg/m3) 气象因素 SO2 NO2 CO O3 PM10 PM2.5 Temp RH Press Ws 大气污染物 SO2 1.000 NO2 0.627a 1.000 CO 0.627a 0.691a 1.000 O3 -0.081b -0.338a -0.243b 1.000 PM10 0.743a 0.623a 0.654a 0.128b 1.000 PM2.5 0.716a 0.656a 0.761a -0.024 0.894a 1.000 气象因素 Temp(℃) -0.493a -0.451a -0.378a 0.554a -0.269a -0.469a 1.000 RH(%) -0.454a -0.029 0.077b -0.440a -0.416a -0.251a 0.104b 1.000 Press(hPa) 0.555a 0.400a 0.328a -0.485a 0.255a 0.385a -0.843a -0.193a 1.000 Ws(m/s) -0.385a -0.455a -0.443a 0.119b -0.277a -0.263a -0.005 -0.134b -0.216a 1.000 心脑血管疾病死亡人数 0.353a 0.283a 0.296a -0.297a 0.298a 0.410a -0.499a -0.137b 0.446a -0.040 注:Spearman相关性检验;a为P<0.001,b为P<0.05。 表 4 不同污染物模型条件下PM2.5与心脑血管疾病死亡之间的关系
Table 4. The relationship between PM2.5 and the deaths of cardio-cerebrovascular disease in different pollutant models
污染物模型 RR(95%CI)值 单污染模型 PM2.5 1.055(1.019~1.093) 双污染模型 PM2.5+SO2 1.026(0.975~1.080) PM2.5+NO2 1.071(1.020~1.124) PM2.5+CO 1.093(1.037~1.151) PM2.5+O3 1.040(1.001~1.080) 注:纳入模型中的变量均为平均滞后5天的值,所有模型均控制了气象因素。 -
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