过去对慢性阻塞性气道疾病的研究主要集中在粘膜分泌亢进、咳嗽、咳痰等症状,而对不同症状或一定时间内的症状变化如何预计肺功能改变或气道阻塞发生的研究将更有意义。作者 Cracow 市和 Tucson 市的流行病学资料进行研究,以了解症状与肺功能之间的关系。研究对象均为白种人。 In the past, studies on chronic obstructive airway disease mainly focused on the symptoms of mucous membrane hypersecretion, cough and expectoration, and the study on how to predict changes in lung function or airway obstruction in response to different symptoms or changes in time will have more significance. The authors studied the epidemiological data from the cities of Cracow and Tucson to understand the relationship between symptoms and lung function. The subjects were all Caucasian.