Objective To study the prevalence and risk factors of chronic obstructive pulmonary disease ( COPD) and provide reliable data for COPD prevention and management. Methods By cluster-random-sampling survey, the residents aged 40 yrs or older in a community in South Bank District of Chongqing were investigated.The post-bronchodilator FEV1 /FVC  lt; 0. 7 was defined as COPD. Those individuals with FEV1 /FVC lower than 0. 7 would received history inquiry, X-ray of chest and ECG to exclude other disease that could impair pulmonary function. Results 1518 residents were enrolled( 517 male and 1001 female) . The prevalence of COPD was 12. 78% ( male 23. 02% and female 7. 49% ) . The major risk factors were cigarettes smoke( OR: 2. 88, 95% CI:2. 118-3. 928) and indoor cooking smoke( OR: 1. 98, 95% CI: 1. 685-3. 317) . There were 22.06% smokers were diagnosed as COPD. Only 9. 30% patients had known themselves disease condition about chronic bronchitis,emphysema or COPD. Conclusion The prevalence of COPD in Chongqing city is significant higher than average level of the whole country and the patients have poor knowledge about the disease.

Citation： LI Qi,LIAO Xiuqing,ZHANG Qiao,WANG Yan,WU Xuelin,XU Zhi,JIANG Han,LUO Qinghong,KONG Deping,ZHAO Zhiqiang,WANG Jinping,QIAN Guisheng,WANG Changzheng.. Epidemiological Sampling Survey on Chronic Obstructive Pulmonary Disease in Urban Area of Chongqing City. Chinese Journal of Respiratory and Critical Care Medicine, 2009, 09(1): 12-15. doi: Copy