烟斗吸烟者比纸烟吸烟者的发病率和死亡率均较低,说明吸烟斗时其肺中存有较少的烟雾。利用血浆中尼古丁的含量可作为测定下列3组烟斗吸烟者吸入肺部烟雾多少的方法。(1)主要用烟斗吸烟,从来没有吸过纸烟者,(2)最近改吸纸烟的烟斗吸烟者,(3)从前吸纸烟,但现在仅吸烟斗者。每个吸烟者都需填写一份关于现在和过去吸烟习惯的简单 Tobacco smokers had lower rates of morbidity and mortality than smokers of cigarettes, indicating that there was less smoke in their lungs when they smoked. The use of nicotine in plasma can be used as a measure of the amount of lung smoke inhaled by the following three groups of pipe smokers. (1) Mainly smoking with a pipe, who has never smoked a cigarette, (2) A smoker who recently smokes a cigarette, (3) A cigarette smoker, but now a smoker. Each smoker is required to write a simple, simple guide about current and past smoking habits