The association between depression risk and age, alcohol use, cigarette smoking and cannabis use in the general adolescent population is not straightforward and may differ according to gender. There is unmet need for help for depression among adolescents.

The demonstration of an association between substance use, unplanned sexual intercourse and other sexual behaviours lends support to a harm minimization approach, including the provision of non-judgemental information and interventions addressing unplanned sexual intercourse under the influence of a substance.

Connections were demonstrated at the population level between ADHD, medical methylphenidate use, the diversion of prescribed methylphenidate and the non-medical use of methylphenidate. The appropriate assessment and management of ADHD are essential to minimize both the risk of diversion and of substance use associated with unrecognized or untreated ADHD.

No abstract

Adolescent, SES, Family affluence scale, Mother’s education, Family structure, Validity,