Adolescent Cannabis Use Linked to Poor Academic Outcomes

A recent meta-analysis published in JAMA Pediatrics has uncovered a significant link between adolescent cannabis use and lower academic achievement, including reduced high school graduation rates, decreased university enrollment, and an overall decline in academic performance. The findings raise critical concerns amid increasing cannabis legalization and declining risk perceptions among youth.

The analysis reviewed 63 studies involving over 400,000 adolescents and young adults under the age of 24. Researchers found moderate-certainty evidence indicating that cannabis use negatively affects multiple academic outcomes, including lower school grades, higher absenteeism, and increased dropout rates.

Key Findings of the Adolescent Cannabis Study:

• Adolescents who used cannabis had 33% lower odds of achieving grades of A or B.
• Frequent cannabis users demonstrated an even stronger negative association with academic performance.
• Cannabis use was linked to 50% lower odds of completing high school and 72% lower odds of enrolling in university.
• The odds of dropping out of school were 2.19 times higher among cannabis users.
• School absenteeism rates were 2.31 times higher in adolescents who used cannabis.
• Cannabis use was also associated with 31% lower odds of attaining a postsecondary degree.

Researchers noted that increased legalization and changing public perceptions around cannabis have led to a rise in adolescent consumption, despite mounting evidence of its adverse effects on education and long-term career outcomes.

Limitations and Implications

While the study offers robust insights, it is limited by its reliance on observational data and variability in outcome measurements across different studies. Furthermore, most studies analyzed were conducted in the United States, which may affect the generalizability of the findings globally.

Study authors emphasized that addressing these concerns requires enhanced education programs, targeted awareness campaigns, and updated public health strategies to reduce adolescent cannabis use and its negative academic impacts.

As cannabis use becomes more normalized, there is an urgent need for evidence-based interventions to mitigate its effects on youth development, education, and future opportunities.

More Information: Chan O, Daudi A, Ji D, et al. Cannabis use during adolescence and young adulthood and academic achievement: a systematic review and meta-analysis. JAMA Pediatr. Published online October 7, 2024. doi:10.1001/jamapediatrics.2024.3674