Cannabis Use Linked to Lower Grades, Truancy, and Detention in Adolescents With and Without Chronic Illness
Among nearly 1,000 adolescents, cannabis use was associated with poorer school performance, attendance, and behavior, with stronger effects in teens who also had a chronic illness.
Quick Facts
What This Study Found
Cannabis use was associated with lower grades (APR 1.54), school truancy (APR 2.16), truancy from activities (similar magnitude), and detention (APR 2.29) after controlling for alcohol, nicotine, and demographics. Alcohol and nicotine use were not independently associated with these outcomes. The cannabis-education association was significantly stronger in adolescents with chronic illness (p < 0.001).
Key Numbers
958 adolescents: 30.7% used alcohol, 23.0% cannabis, 13.2% nicotine in past year. 42.5% had at least one educational impact. Cannabis APRs: lower grades 1.54 (1.13-2.11), school truancy 2.16 (1.52-3.07), detention 2.29 (1.33-3.94). Chronic illness interaction p < 0.001. 46.5% received subspecialty care.
How They Did This
Cross-sectional survey of 958 adolescents (mean age 16.0 years, 58.9% female) receiving general or subspecialty medical care, from 2016-2018. Modified Poisson regression models estimated prevalence ratios for educational impacts, controlling for all three substances simultaneously plus sociodemographic factors.
Why This Research Matters
By controlling for concurrent alcohol and nicotine use, this study isolates cannabis as the substance most strongly linked to academic problems in teens. The amplified effect in chronically ill adolescents highlights a vulnerable population that may use cannabis for symptom management but face disproportionate educational consequences.
The Bigger Picture
Prevention messaging often lumps all adolescent substance use together. These findings suggest cannabis deserves particular attention for its association with school performance, and that school-based prevention efforts might be most impactful when tailored to students managing chronic health conditions.
What This Study Doesn't Tell Us
Cross-sectional data cannot establish that cannabis use caused educational problems. The clinical sample may not represent all adolescents. Self-reported measures could be affected by social desirability bias. "Chronic illness" was defined by subspecialty care rather than specific diagnoses.
Questions This Raises
- ?Through what mechanisms does cannabis specifically affect school performance beyond what alcohol and nicotine produce?
- ?Does reducing cannabis use in chronically ill teens improve their educational outcomes?
Trust & Context
- Key Stat:
- 2.29x higher prevalence of detention associated with adolescent cannabis use
- Evidence Grade:
- Moderate: well-controlled analysis in a clinical sample, but cross-sectional design and self-reported measures limit causal inference.
- Study Age:
- 2024 publication using 2016-2018 data.
- Original Title:
- Substance Use and Educational Impacts in Youth With and Without Chronic Illness.
- Published In:
- American journal of preventive medicine, 66(2), 279-290 (2024)
- Authors:
- Weitzman, Elissa R(5), Minegishi, Machiko(2), Wisk, Lauren E(4), Levy, Sharon
- Database ID:
- RTHC-05808
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
Why is cannabis linked to school problems but not alcohol or nicotine?
After controlling for all three substances, only cannabis remained independently associated with educational impacts. This may reflect cannabis's effects on adolescent cognition, motivation, and executive function, which are critical for academic performance.
Why are chronically ill teens more vulnerable?
Teens with chronic illness already face academic challenges from their conditions. Adding cannabis use may compound cognitive or motivational effects, and these teens may use cannabis more regularly for symptom relief, increasing cumulative exposure.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-05808APA
Weitzman, Elissa R; Minegishi, Machiko; Wisk, Lauren E; Levy, Sharon. (2024). Substance Use and Educational Impacts in Youth With and Without Chronic Illness.. American journal of preventive medicine, 66(2), 279-290. https://doi.org/10.1016/j.amepre.2023.09.029
MLA
Weitzman, Elissa R, et al. "Substance Use and Educational Impacts in Youth With and Without Chronic Illness.." American journal of preventive medicine, 2024. https://doi.org/10.1016/j.amepre.2023.09.029
RethinkTHC
RethinkTHC Research Database. "Substance Use and Educational Impacts in Youth With and With..." RTHC-05808. Retrieved from https://rethinkthc.com/research/weitzman-2024-substance-use-and-educational
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.