Wald N J, Idle M, Boreham J, Bailey A
Thorax. 1980 Dec;35(12):925-8. doi: 10.1136/thx.35.12.925.
Inhaling habits were studied in 1316 men who freely smoked their usual brands of cigarette. An index of inhaling was calculated for each person by dividing the estimated increase in carboxyhaemoglobin level from a standard number of cigarettes by the carbon monoxide yield of the cigarette smoked. Smokers of ventilated filter cigarettes inhaled 82% more than smokers of plain cigarettes (p less than 0.001) and those who smoked unventilated filter cigarettes inhaled 36% more (p less than 0.001). Cigarette consumption was similar among smokers of each type of cigarette. Assuming that the intake of tar and nicotine is proportional to the inhaling index, the intake in either group of filter cigarette smokers would have been less than that in plain cigarette smokers. Among smokers of unventilated cigarettes, however, the intake would not have been much less.
对1316名自由吸食其常用品牌香烟的男性的吸入习惯进行了研究。通过用标准数量香烟导致的羧基血红蛋白水平估计增加量除以所吸香烟的一氧化碳产量，为每个人计算了一个吸入指数。通风过滤嘴香烟吸烟者的吸入量比普通香烟吸烟者多82%（p<0.001），而吸不通风过滤嘴香烟者的吸入量多36%（p<0.001）。每种香烟类型的吸烟者的香烟消费量相似。假设焦油和尼古丁的摄入量与吸入指数成正比，那么两类过滤嘴香烟吸烟者的摄入量都应低于普通香烟吸烟者。然而，在吸不通风香烟的人群中，摄入量不会少太多。
