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Early determinants of smoking in adolescence: a prospective birth cohort study
A M Menezes
Abstract
The effect of early exposures on tobacco smoking has rarely been assessed. In a prospective birth cohort study in Brazil, the prevalence and early risk factors for smoking in adolescence were investigated. All 1982 hospital-born children in Pelotas, Southern Brazil, were enrolled in a birth cohort study (N=5,914; boys: 3,037; girls: 2,877). All male participants were searched in 2000 when enrolling in the national army, and 78.8% were traced. In 2001, a systematic sample of 473 girls were interviewed, representing a follow-up rate of 69.1%. Among males, 48.6% (95%CI 46.6;50.7) had ever experimented smoking and 15.8% (95%CI 14.3;17.3) were daily smokers. Among females, 53.1% (95%CI 48.6;57.6) had ever experimented smoking and 15.4% (95%CI 12.1;18.7) were daily smokers. Boys born to unmarried women and with fathers with low schooling were more likely to smoke in adolescence. Girls from low income families, with mothers who smoked during pregnancy, and fathers with alcohol rela!
ted problems were more likely to smoke. Although the prevalence of smoking was similar in boys and girls, risk factors for smoking were different across the sexes. Social environment seems to be the strongest predictor of tobacco use in adolescence.
Biographies
Menezes, AM - Professor of Respiratory Medicine; vice-coordinator of the Post-Graduate Course in Epidemiology at the Federal University of Pelotas; MsC in Respiratory Medicine at the Southampton University, England; PhD in Epidemiology at the Federal University of Rio Grande do Sul, Brazil.
Hallal, PC - PhD fellowhip at the Post-Graduate Course of Epidemiology at the Federal University of Pelotas, RS, Brazil;
Horta, BL - Associate Professor at the Post-Graduate Course in Epidemiology at the Federal University of Pelotas, Brazil; MsC in Epidemiology at the Federal University of Pelotas; PhD at the McGill University, Montreal, Canada
Author 1: Menezes, AM
Professor of Respiratory Medicine; vice-coordinator of the Post-Graduate Course in Epidemiology
Av. Domingos de Almeida, 1146/25
Pelotas
96085-470
Brazil
Author 2: Hallal, PC
Author 3: Horta, BL
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