慢性阻塞性肺疾病(COPD)是一种可以预防和治疗的疾病,以气流限制不完全可逆为特征,是与肺部对有害气体或有害颗粒的异常炎症反应相关的慢性进行性疾病。2004年周玉民等[1]通过对国内七个城市40岁人群的流行病学调查发现,COPD总的患病率为8.2%,其中男、女性患病率分别为12.4%和 Chronic Obstructive Pulmonary Disease (COPD) is a preventable and treatable disease characterized by incompletely reversible airflow restriction and is a chronic, progressive disease associated with an abnormal inflammatory response to noxious gases or noxious particles in the lungs. In 2004, Zhou et al. [1] conducted an epidemiological survey of 40-year-olds in seven cities in China and found that the overall prevalence of COPD was 8.2%. The prevalence rates of male and female were 12.4% and