The Association Between the Particulate Matter and the Hospital Emergency Room Visits for Circulatory Diseases: A Case-Crossover Study

Abstract

ISEE-0085 Backgroud and Objective: Some studies have found that ambient particles are associated with the population mortality, however, little work has been done to explore the effects of the air particles on the hospital emergency room visits for cardiovascular diseases in China. Our study seeks to explore the association between the levels of particulate matter with an aerodynamic diameter of <10 um (PM10) and the hospital emergency room visits for circulatory diseases (International Classification of Diseases, tenth vision ICD-10: I00∼I99) in Beijing, China. Method: We collected data on daily hospital emergency room visits for circulatory diseases (ICD-10: I00∼I99)from Peking University Third Hospital and the data of relevant ambient air PM10 from the Beijing Municipal Environmental Monitoring Center. The time-stratified case-crossover design was used to do data analysis. Results: The no-lagged unidirectional case-crossover design with 1:4 matched pairs had the best effect for the odds ratios (ORs) between the PM10 and the hospital emergency room visits for circulatory diseases. After adjusting the temperature and the relative humidity, a 10 μg/m3 increased in the PM10 was associated with the emergency room visits on value of Odd ratios 1.006 (95%CI: 1.003∼1.008) for the total circulatory diseases (ICD-10: I00∼I99), 1.003 (95%CI: 0.996∼1.010) for the coronary heart disease (ICD-10: I20∼I25), 1.005 (95%CI: 0.997∼1.013) for the cardiac arrhythmia (ICD-10: I47∼I49), 1.019 (95%CI: 1.005∼1.033) for the heart failure disease (ICD-10: I50), and 1.003 (95%CI: 0.998∼1.007) for the cerebrovascular diseases (ICD-10: I60∼I69), respectively. Conclusion: Elevated levels of the PM10 are positively associated with the hospital emergency room visits for the total circulatory diseases and the heart failure disease in Beijing (P << 0.05).