Differential Contributions of Parents and Friends to Smoking Trajectories During Adolescence
Référence bibliographique 
Vitaro, Frank, Wanner, Brigitte, Brendgen, Mara, Gosselin, Catherine et Gendreau, Paul L. 2004. «Differential Contributions of Parents and Friends to Smoking Trajectories During Adolescence ». Addictive Behaviors, vol. 29, no 29, p. 831-835.
Intentions : « The goal of the present study was to help clarify the [issues surrounding smoking initiation] by showing that the contribution of parents’ and friends’ smoking to smoking initiation during adolescence varied according to the participants’ smoking trajectories based on the age of onset and level of use. » (p. 832)
Échantillon/Matériau : « 802 participants (405 boys and 407 girls) aged 9 through 11.5 years [...]. » (p. 832)
Instruments : Guide d’entretien
Type de traitement des données : Analyse statistique
« Three smoking trajectory groups were first established: an age 11-12 starters group (5.7% of the sample), an age 12-13 starters group (11.1% of the sample), and an age 13-14 starters group (7.9% of the sample). A fourth trajectory group included the children who had not started smoking by age 15 years and who represented the majority of the participants (75.4%). After controlling for parental education, gender, and participants’ behavioral and academic maladjustment, a series of logistic regressions revealed that parents’ smoking assessed during the same year predicted membership in the age 11-12 starters trajectory group. Both parents’ and friends’ smoking predicted membership in the age 12-13 starters group. Finally, only friends’ smoking predicted membership in the age 13-14 starters group. The results are discussed in light of the controversy about the contribution of parents’ and friends’ smoking behavior to smoking initiation in adolescents. » (p. 831)