For the study, researchers from the UCL Centre for Longitudinal Studies analysed data from nearly 10,000 people born across the UK in 2000-02 who are taking part in the Millennium Cohort Study. At age 23, study participants were asked how often they used drugs and alcohol and took part in other potentially addictive behaviour such as gambling. The study’s authors compared these data with reports from the same participants when they were age 17. Published as a briefing paper, the research shows