粘液分泌过多与气道阻塞间的关系未明。Fletcher和Peto根据一组随访资料得出结论是上述两种情况是各别的,基本上无甚关系,可同时发生,但均与吸烟有关。从英国各地调查至少在20年前就获得完整随访资料共2,718例,包括1982年前1,190例的死亡登记资料。所采用检测肺功能的标准是FEV_1/H~3(高 The relationship between mucus hypersecretion and airway obstruction is unknown. Fletcher and Peto concluded from a series of follow-up data that the above two conditions are separate and largely unrelated and can occur simultaneously, all of which are related to smoking. A total of 2,718 complete follow-ups were obtained at least 20 years ago from surveys in the United Kingdom, including 1,190 pre-1982 death registration data. The standard used to detect lung function is FEV_1 / H ~ 3 (high