TOBACCO-SMOKE HABITS IN A GROUP OF ADOLESCENTS - RESPONSIBILITY OF THE COHABITANTS IN THE ACTIVE AND PASSIVE EXPOSURE

Several studies in adults demonstrated a positive relationship between the number of cigarettes smoked and the urinary cotinine. The aim of this work was to analyze the passive and active smoking exposure of 33 3 sixteen-year-old students, demonstrated by their urinary cotinine, i n comparison with the smoking habits of all the cohabitants. This last information was obtained from a questionnaire and urinary cotinine in mothers. The second purpose of this work was to observe whether the s moking habits of parents can promote the voluntary active exposure to tobacco smoke in children. The considered students represent a particu lar group of people (16 years old) having a life-style still strictly bound to the smoking habit of parents. In fact, the nonactive smokers show urinary cotinine levels described by the following means: 28.81, 39.35, 39.62, and 57.67 ng/mL. This finding demonstrates a trend of ex posure from no exposure to a maximum level of passive exposure. Simila r results can be observed by considering the urinary cotinine of mothe rs. Finally, the active smoking habit potentially acquired by the adol escents seems to be induced also by emulation of the smoking habits of fathers. This possibility is demonstrated by a light positive and sta tistically significative correlation with the number of cigarettes act ively smoked and, consequently, with urinary cotinine. (C) 1997 Academ ic Press.