PURPOSE: To describe longitudinal trajectories of smoking intensity in adolescent novice smokers and to identify predictors of trajectory class membership. METHODS: Cigarette consumption among 369 novice smokers (mean age 13 years) was measured over a mean 24 months of follow-up after smoking onset. Classes of smoking intensity trajectories were identified using latent class growth modeling. Predictors of trajectory class membership were identified in polytomous logistic regression. RESULTS: There was considerable between-subject heterogeneity in individual trajectories over time. Four classes of smoking intensity trajectories were identified: low-intensity, non-progressing smokers (72.4% of subjects), and slow, moderate, and rapid escalators (11.1%, 10.8%, and 5.7% of subjects, respectively). Gender, poor academic performance, and having more than half of friends who smoke at smoking onset independently predicted development of trajectory pattern. Escalating trajectory patterns were associated with earlier development of nicotine dependence and tolerance. CONCLUSIONS: Cigarette consumption will not escalate rapidly among three-quarters of adolescent novice smokers. Novice smokers who do escalate rapidly should be targeted for early tobacco control intervention to prevent development of nicotine dependence and sustained smoking.
PURPOSE: To describe longitudinal trajectories of smoking intensity in adolescent novice smokers and to identify predictors of trajectory class membership. METHODS: Cigarette consumption among 369 novice smokers (mean age 13 years) was measured over a mean 24 months of follow-up after smoking onset. Classes of smoking intensity trajectories were identified using latent class growth modeling. Predictors of trajectory class membership were identified in polytomous logistic regression. RESULTS: There was considerable between-subject heterogeneity in individual trajectories over time. Four classes of smoking intensity trajectories were identified: low-intensity, non-progressing smokers (72.4% of subjects), and slow, moderate, and rapid escalators (11.1%, 10.8%, and 5.7% of subjects, respectively). Gender, poor academic performance, and having more than half of friends who smoke at smoking onset independently predicted development of trajectory pattern. Escalating trajectory patterns were associated with earlier development of nicotine dependence and tolerance. CONCLUSIONS: Cigarette consumption will not escalate rapidly among three-quarters of adolescent novice smokers. Novice smokers who do escalate rapidly should be targeted for early tobacco control intervention to prevent development of nicotine dependence and sustained smoking.
Authors: Brian A Primack; Meghan R Longacre; Michael L Beach; Anna M Adachi-Mejia; Linda J Titus; Madeline A Dalton Journal: J Natl Cancer Inst Date: 2012-03-14 Impact factor: 13.506
Authors: Elizabeth K Do; Elizabeth C Prom-Wormley; Lindon J Eaves; Judy L Silberg; Donna R Miles; Hermine H Maes Journal: Twin Res Hum Genet Date: 2015-02 Impact factor: 1.587
Authors: Debra H Bernat; Darin J Erickson; Rachel Widome; Cheryl L Perry; Jean L Forster Journal: J Adolesc Health Date: 2008-05-29 Impact factor: 5.012
Authors: Jennifer O'Loughlin; Erika N Dugas; Jennifer Brunet; Joseph DiFranza; James C Engert; Andre Gervais; Katherine Gray-Donald; Igor Karp; Nancy C Low; Catherine Sabiston; Marie-Pierre Sylvestre; Rachel F Tyndale; Nathalie Auger; Nathalie Auger; Belanger Mathieu; Barnett Tracie; Michael Chaiton; Meghan J Chenoweth; Evelyn Constantin; Gisèle Contreras; Lisa Kakinami; Aurelie Labbe; Katerina Maximova; Elizabeth McMillan; Erin K O'Loughlin; Roman Pabayo; Marie-Hélène Roy-Gagnon; Michèle Tremblay; Robert J Wellman; Andraeavan Hulst; Gilles Paradis Journal: Int J Epidemiol Date: 2014-07-13 Impact factor: 7.196
Authors: Bernard Fuemmeler; Chien-Ti Lee; Krista W Ranby; Trenette Clark; F Joseph McClernon; Chongming Yang; Scott H Kollins Journal: Drug Alcohol Depend Date: 2013-03-15 Impact factor: 4.492