title: Cohort Profile: The Nicotine Dependence in Teens (NDIT) Study.
abstract: The Nicotine Dependence in Teens (NDIT) study is a prospective cohort investigation of 1294 students recruited in 1999-2000 from all grade 7 classes in a convenience sample of 10 high schools in Montreal, Canada. Its primary objectives were to study the natural course and determinants of cigarette smoking and nicotine dependence in novice smokers. The main source of data was self-report questionnaires administered in class at school every 3 months from grade 7 to grade 11 (1999-2005), for a total of 20 survey cycles during high school education. Questionnaires were also completed after graduation from high school in 2007-08 and 2011-12 (survey cycles 21 and 22, respectively) when participants were aged 20 and 24 years on average, respectively. In addition to its primary objectives, NDIT has embedded studies on obesity, blood pressure, physical activity, team sports, sedentary behaviour, diet, genetics, alcohol use, use of illicit drugs, second-hand smoke, gambling, sleep and mental health. Results to date are described in 58 publications, 20 manuscripts in preparation, 13 MSc and PhD theses and 111 conference presentations. Access to NDIT data is open to university-appointed or affiliated investigators and to masters, doctoral and postdoctoral students, through their primary supervisor (www.nditstudy.ca).
authors.affiliation: Centre de Recherche CHUM, Montreal, QC, Canada, Department of Social and Preventive Medicine, University of Montreal, Montreal, QC, Canada, Institut National de Santé Publique du Québec, Montreal, QC, Canada, jennifer.oloughlin@umontreal.ca.
authors.forename: Jennifer
authors.initials: J
authors.lastname: O'Loughlin
authors.affiliation: Centre de Recherche CHUM, Montreal, QC, Canada.
authors.forename: Erika N
authors.initials: EN
authors.lastname: Dugas
authors.affiliation: School of Human Kinetics, University of Ottawa, Ottawa, ON, Canada.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Brunet
authors.affiliation: Department of Family Medicine and Community Health, University of Massachusetts Medical School, Worcester, MA, USA.
authors.forename: Joseph
authors.initials: J
authors.lastname: DiFranza
authors.affiliation: Department of Medicine and Genetics, McGill University, Montreal, QC, Canada, Research Institute of the McGill University Health Center, Montreal, QC, Canada.
authors.forename: James C
authors.initials: JC
authors.lastname: Engert
authors.affiliation: Agence de la Santé et des Services Sociaux, Direction de Santé Publique, Montréal, QC, Canada.
authors.forename: Andre
authors.initials: A
authors.lastname: Gervais
authors.affiliation: School of Dietetics and Human Nutrition and.
authors.forename: Katherine
authors.initials: K
authors.lastname: Gray-Donald
authors.affiliation: Centre de Recherche CHUM, Montreal, QC, Canada, Department of Social and Preventive Medicine, University of Montreal, Montreal, QC, Canada.
authors.forename: Igor
authors.initials: I
authors.lastname: Karp
authors.affiliation: Department of Psychiatry, McGill University, Montreal, QC, Canada.
authors.forename: Nancy C
authors.initials: NC
authors.lastname: Low
authors.affiliation: Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada.
authors.forename: Catherine
authors.initials: C
authors.lastname: Sabiston
authors.affiliation: Centre de Recherche CHUM, Montreal, QC, Canada, Department of Social and Preventive Medicine, University of Montreal, Montreal, QC, Canada.
authors.forename: Marie-Pierre
authors.initials: MP
authors.lastname: Sylvestre
authors.affiliation: Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada Department of Psychiatry and Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada.
authors.forename: Rachel F
authors.initials: RF
authors.lastname: Tyndale
authors.forename: Nathalie
authors.initials: N
authors.lastname: Auger
authors.forename: Nathalie
authors.initials: N
authors.lastname: Auger
authors.forename: Belanger
authors.initials: B
authors.lastname: Mathieu
authors.forename: Barnett
authors.initials: B
authors.lastname: Tracie
authors.forename: Michael
authors.initials: M
authors.lastname: Chaiton
authors.forename: Meghan J
authors.initials: MJ
authors.lastname: Chenoweth
authors.forename: Evelyn
authors.initials: E
authors.lastname: Constantin
authors.forename: Gisèle
authors.initials: G
authors.lastname: Contreras
authors.forename: Lisa
authors.initials: L
authors.lastname: Kakinami
authors.forename: Aurelie
authors.initials: A
authors.lastname: Labbe
authors.forename: Katerina
authors.initials: K
authors.lastname: Maximova
authors.forename: Elizabeth
authors.initials: E
authors.lastname: McMillan
authors.forename: Erin K
authors.initials: EK
authors.lastname: O'Loughlin
authors.forename: Roman
authors.initials: R
authors.lastname: Pabayo
authors.forename: Marie-Hélène
authors.initials: MH
authors.lastname: Roy-Gagnon
authors.forename: Michèle
authors.initials: M
authors.lastname: Tremblay
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Wellman
authors.forename: Andraeavan
authors.initials: A
authors.lastname: Hulst
authors.forename: Gilles
authors.initials: G
authors.lastname: Paradis
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D002170:Canada; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D012574:Schools; D057566:Self Report; D012907:Smoking / Q000453:epidemiology*; D014029:Tobacco Use Disorder / Q000453:epidemiology*