Abstract
The accuracy of smoking habit answers through a questionnaire was examined. Smoking habit was examined using a questionnaire in 100 subjects who underwent health examination, and the concentration of urinary cotinine was measured. The concenration of expiratory carbon monoxide was measured in 9 subjects who had quit smoking after a program. Five of the 80 subjects who said they were non-smokers (20%) were judged to be smokers based on the concentration of urinary cotinine. Two of the 9 subjects were judged to be smokers based on the concentration of expiratory carbon monoxide. In both examinat ions, some male subjects considered “less smoking” as “no smoking”, and some female subjects concealed their smoking habit. Since one in 5 smokers would not report smoking habit, it is necessary to examine biological parameters, and to prepare a comprehensive questionnaire.
