The Association between School Performance at 14 Years and Young Adults' Use of Cannabis: An Australian Birth Cohort Study

Abstract

This study examines, firstly, the association between school performance at 14 years and frequency of use of cannabis in early adulthood and, secondly, whether this association is explained by family and individual characteristics, including child cognitive capacity in childhood and adolescence. Data are from a cohort of 3,478 Australian young adults who were followed up from birth to age 21 years. Data on child school performance and use of cannabis were collected at the 14- and 21-year follow-ups, respectively. Child school performance was assessed at 14 years via self- and maternal-report. Potential confounding factors were measured between the child's birth and age 14 years. School performance at 14 years predicts young adults' use of cannabis. Children who had lower school performance had increased risk of frequent use of cannabis in young adulthood. Exploration of the pathway linking school performance and cannabis use in young people may help identify opportunities for preventive interventions.