Rimington J
Br Med J. 1973 Mar 31;1(5856):776-8. doi: 10.1136/bmj.1.5856.776.
Male volunteers for mass radiography examination, aged 40 or more, were questioned about their sputum production, smoking habits, and, when applicable, their method of smoking cigarettes.Of 5,438 cigarette smokers 460 (8.4%) smoked their cigarettes without removing the cigarette from the mouth between puffs ("drooping" cigarette smokers) whereas the rest smoked in the normal manner.Persons who admitted to producing sputum from their chests on most days of the year or on most days for at least three months of the year for a minimum of two years were classified as chronic bronchitics in the absence of other causative disease.The rate of chronic bronchitis among the "drooping" cigarette smokers (41.5%) was considerably greater than that among those smoking cigarettes in the normal manner (33.6%). The same pattern was maintained when age and cigarette consumption were standardized, though "drooping" cigarette smokers had a slight bias towards plain as distinct from filter cigarettes and towards a lower social class this was not sufficient to account for the excess of chronic bronchitis among those using this method of smoking.
年龄在40岁及以上、参加大规模X光检查的男性志愿者被询问了痰液分泌情况、吸烟习惯，以及适用时的吸烟方式。在5438名吸烟者中，有460人（8.4%）在吸两口烟之间不把香烟从嘴里拿出来（“下垂式”吸烟者），其余的人则以正常方式吸烟。那些承认在一年中的大部分日子里，或至少连续三年中每年至少三个月、每天至少咳出胸部痰液达两年的人，在没有其他致病疾病的情况下被归类为慢性支气管炎患者。“下垂式”吸烟者中的慢性支气管炎发病率（41.5%）明显高于以正常方式吸烟的人（33.6%）。当对年龄和香烟消费量进行标准化时，同样的模式依然存在，尽管“下垂式”吸烟者对普通香烟而非过滤嘴香烟略有偏好，且社会阶层较低，但这不足以解释采用这种吸烟方式的人慢性支气管炎发病率较高的原因。
