Cannabis Use Predicted Late College Dropout Even After Accounting for Depression
Cannabis use during freshman year predicted discontinuous college enrollment in later years, while depression predicted early enrollment gaps, suggesting different timing mechanisms for these risk factors.
Quick Facts
What This Study Found
Researchers followed 1,145 college students for four years. Depression symptoms at college entry predicted early enrollment gaps (first two years), while cannabis use predicted later gaps (years 3-4). Receiving a depression diagnosis during college was associated with both early and late discontinuity.
Importantly, pre-college psychiatric diagnoses did not predict enrollment interruptions once background characteristics were controlled. This suggests that active substance use and mental health problems during college, not pre-existing conditions, drive enrollment disruption.
Key Numbers
1,145 students followed for 4 years. Depression (BDI) predicted early but not late discontinuity. Cannabis and alcohol predicted late but not early discontinuity. Depression diagnosis during college predicted both. Pre-college diagnoses: not significant after controlling for background.
How They Did This
Longitudinal study of 1,145 students at a large public university, interviewed annually for four years starting at college entry in 2004. Enrollment data from university records. Measures included BDI, BAI, childhood conduct problems, cannabis use, illicit drug use, and alcohol consumption. Multinomial logistic regression controlled for background characteristics.
Why This Research Matters
College dropout has long-term consequences for earnings, health, and life satisfaction. Understanding that cannabis use specifically predicts later enrollment gaps (not early ones) helps universities target interventions at the right time and for the right risk factors.
The Bigger Picture
This study demonstrates that substance use and mental health problems have distinct temporal patterns in their impact on academic outcomes. Depression disrupts earlier (perhaps through immediate motivation and functioning effects), while cannabis effects accumulate and manifest later, possibly through gradual academic decline.
What This Study Doesn't Tell Us
Single university study may not generalize to other institutions. Self-reported substance use may underestimate actual use. "Discontinuous enrollment" includes both voluntary and involuntary interruptions for various reasons. Cannabis use was measured at baseline and may have changed over the study period.
Questions This Raises
- ?Would targeted cannabis use interventions during sophomore and junior year prevent later dropout?
- ?Does the cannabis-dropout relationship hold at different types of institutions?
- ?Could early cannabis use screening identify at-risk students before academic problems manifest?
Trust & Context
- Key Stat:
- Cannabis predicted late (years 3-4) but not early enrollment gaps
- Evidence Grade:
- Prospective longitudinal study with university enrollment data; moderate evidence with appropriate controls.
- Study Age:
- Published in 2013. Research on substance use and college outcomes has continued with larger, multi-institutional studies.
- Original Title:
- Discontinuous college enrollment: associations with substance use and mental health.
- Published In:
- Psychiatric services (Washington, D.C.), 64(2), 165-72 (2013)
- Authors:
- Arria, Amelia M(3), Caldeira, Kimberly M(2), Vincent, Kathryn B(2), Winick, Emily R, Baron, Rebecca A, O'Grady, Kevin E
- Database ID:
- RTHC-00645
Evidence Hierarchy
Follows a group of people over time to track how outcomes develop.
What do these levels mean? →Frequently Asked Questions
Does cannabis cause college dropout?
This study found cannabis use during freshman year predicted enrollment gaps in years 3 and 4, even after accounting for depression, anxiety, and background factors. However, it cannot prove causation. Cannabis use may be part of a broader pattern of disengagement, or other unmeasured factors may contribute to both cannabis use and dropout.
Why does cannabis affect enrollment later but not earlier?
The authors suggest cannabis effects on academic performance may accumulate gradually. Unlike depression, which can immediately impair daily functioning and trigger early withdrawal, the academic consequences of regular cannabis use, such as missed classes, lower grades, and declining motivation, may take time to reach the point where enrollment is interrupted.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-00645APA
Arria, Amelia M; Caldeira, Kimberly M; Vincent, Kathryn B; Winick, Emily R; Baron, Rebecca A; O'Grady, Kevin E. (2013). Discontinuous college enrollment: associations with substance use and mental health.. Psychiatric services (Washington, D.C.), 64(2), 165-72. https://doi.org/10.1176/appi.ps.201200106
MLA
Arria, Amelia M, et al. "Discontinuous college enrollment: associations with substance use and mental health.." Psychiatric services (Washington, 2013. https://doi.org/10.1176/appi.ps.201200106
RethinkTHC
RethinkTHC Research Database. "Discontinuous college enrollment: associations with substanc..." RTHC-00645. Retrieved from https://rethinkthc.com/research/arria-2013-discontinuous-college-enrollment-associations
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.