The sample sizes were 3566 at age 17 years, 3940 at 20 years, and 3841 at 24 years only 1672 completed all three surveys. Participants completed computer-administered gambling surveys in research clinics, on paper, and online. A large contemporary UK cohort study, the Avon Longitudinal Study of Parents and Children, was used to investigate gambling behavior and to explore the antecedents of regular gambling in the 17–24-year age group.
