Quantitative relationships between cigarette smoking and ventilatory function.

摘要: In this study of a general population sample, highly significant quantitative relationships were noted between pack-years smoking and functional impairment. Subjects with chronic productive cough showed steeper declines in the forced expired volume 1 sec expiratory flow after exhalation 75 per cent vital capacity (Vmax25), but definite inverse relationship ventilatory function was demonstrated even among subjects who denied any or sputum production. Current no to 1-sec Vmax25 when total taken into account. Age appeared be an important independent determinant predicted values only regard symptomatic, nonsmoking women. A history childhood respiratory trouble associated lower regardless habits, for reason such have been deleted from detailed analyses dose-effect relation...