Cohort Profile: The Nicotine Dependence in Teens (NDIT) Study

UMMS Affiliation

Department of Family Medicine and Community Health

Publication Date


Document Type



Behavior and Behavior Mechanisms | Clinical Epidemiology | Community Health and Preventive Medicine | Epidemiology | Family Medicine | Heterocyclic Compounds | Investigative Techniques | Preventive Medicine | Primary Care | Substance Abuse and Addiction


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). behalf of the International Epidemiological Association.


nicotine dependence, obesity, physical activity, smoking, passive smoking, blood pressure, diet, lack of exercise, adolescent, alcohol drinking, canada, gambling, mental health, genetics, sleep, illicit drugs, montreal, team sports, high schools self-report

DOI of Published Version



Int J Epidemiol. 2014 Jul 13. pii: dyu135. Link to article on publisher's site

Journal/Book/Conference Title

International journal of epidemiology


Full author list omitted for brevity. For the full list of authors, see article.

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Link to Article in PubMed

PubMed ID