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To assess the associations of intoxication frequency and number of drinks needed to become intoxicated in mid‐adolescence with onset of psychiatric disorders in early adulthood.

Prospective cohort study in Northern Finland, with people from the Northern Finland Birth Cohort 1986 who self‐reported adolescent alcohol use: 6548 subjects (69.4% of the original sample). Data on alcohol use were collected using questionnaires at ages 15–16 years.

Outcomes were any non‐organic psychosis, mood disorder, anxiety disorder, any substance use disorder (SUD) and all the studied psychiatric disorders in early adulthood gathered from nation‐wide health care, pension and insurance registers. Number of drinks needed to become intoxicated was categorized into three classes: (1) no alcohol use or intoxication, and (2) low and (3) high alcohol tolerance (more …