The association between fine particulate air pollution and hospital emergency room visits for cardiovascular diseases in Beijing, China

摘要

Background: Because epidemiological studies have yielded different results, the association betweenrnexposure to fine particulate matter less than 2.5 μm in aerodynamic diameter (PM2.5) and acute events ofrncardiovascular diseases (CVD) is unknown. Additionally, no research has been conducted to explore thernassociation between PM_(2.5) and hospital emergency room (ER) visits of cardiovascular diseases in Beijing,rnChina.rnObjective: To explore the association between PM2.5 and the hospital ER visits in Beijing, China for CVDrn{(International Classification of Diseases, 10th vision (ICD-10): 100-199)}.rnMethods: We collected data for daily hospital ER visits for CVD from the Peking University Third Hospital,rndaily ambient PM2.5 data from a fixed monitor site at Peking University, and data on the daily level of gaseousrnair pollutants {sulfur dioxide (SO_2) and nitrogen dioxide (NO_2)} from the Beijing Municipal EnvironmentalrnMonitoring Center between June 1,2004 and December 31,2006. A time-stratified case-crossover design wasrnused to evaluate associations between CVD health outcomes and ambient air pollutants.rnResults: 8377 hospital ER visits of CVD were collected in our study. After adjusting the temperature and thernrelative humidity, the associations for 10 ug/m3 increases in levels of PM_(2.5), SO_2, or NO_2 and hospital ER visitsrnfor cardiovascular diseases were statistically significant with odds ratios (ORs) of 1.005{95% confidencerninterval (CI): 1.001-1.009}, 1.014(95% CI: 1.004-1.024), and 1.016(95% CI: 1.003-1.029), respectively.rnConclusion: These findings suggest that elevated levels of ambient air pollutants are associated with thernincrease in hospital ER visits for CVD in Beijing, China.