title: Predictors of transition in smoking stages in Iranian adolescents: latent transition analysis.
abstract: This study determined the prevalence of smoking stages in adolescents, the probability of transition across stages and the personal and environmental predictors of transition. A school-based study was conducted in 2010-11 using a random sample of 5197 students (mean age 15.7 years) in Tabriz city. The students were evaluated twice, 12-months apart. The latent transition analysis model revealed 9 interpretable statuses for the measurement of smoking stages. Prevalence data showed that at the first and second assessments 75.1% and 66.8% of students respectively were in the committer stage, while 4.8% and 7.1% respectively were daily smokers. Over 12 months, 10.1% of the never smokers became experimenters and 1.7% became regular smokers, while 17.0% of experimenters became regular smokers. The analysis also showed factors associated with transitions in cigarette smoking stages. Although the prevalence of smoking was low in our adolescents, the rate of becoming a smoker over 1 year was high.
authors: Department of Human Nutrition and Food Safety, School of Public Health, Qazvin University of Medical Sciences, Qazvin, Islamic Republic of Iran.
authors: A
authors: A
authors: Mohammadpoorasl
authors: Department of Epidemiology and Biostatistics; Knowledge Utilization Research Centre, School of Public Health, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.
authors: S
authors: S
authors: Nedjat
authors: Clinical Psychiatry Research Centre, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.
authors: A
authors: A
authors: Fakhari
authors: Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.
authors: K
authors: K
authors: Yazdani
authors: Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.
authors: A
authors: A
authors: Fotouhi
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D005260:Female; D006801:Humans; D007492:Iran / Q000453:epidemiology; D008137:Longitudinal Studies; D008297:Male; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology*; D013997:Time Factors