Starting cannabis before age 15 was associated with 4 times higher odds of suicide attempt
Among 15,238 US adults, early cannabis initiation (age 14 or younger) was associated with 3.3 times higher odds of suicidal ideation and 4.4 times higher odds of suicide attempt compared to non-users.
Quick Facts
What This Study Found
Early cannabis use (age 14 or younger) was associated with higher risks of suicide ideation (AOR 3.32) and attempt (AOR 4.38) than later initiation (AOR 2.15 and 2.56 respectively). The differences between early and late initiation were statistically significant for both outcomes.
Key Numbers
Sample: 15,238. Suicide ideation: 12.5%. Suicide attempt: 4.2%. Early initiation ideation AOR: 3.32 (95% CI 2.75-3.80). Late initiation ideation AOR: 2.15. Early attempt AOR: 4.38 (95% CI 3.48-5.52). Late attempt AOR: 2.56.
How They Did This
Cross-sectional analysis of the Collaborative Psychiatric Epidemiology Surveys (2001-2003, N=15,238). Logistic regression examined associations between early (14 or younger) vs. later (over 14) cannabis initiation and lifetime suicide ideation and attempt, controlling for cigarette use, demographics, and other factors.
Why This Research Matters
The dose-response relationship between earlier cannabis initiation and suicide risk suggests that delaying cannabis exposure during adolescent brain development may be an important prevention target.
The Bigger Picture
While the study cannot prove cannabis causes suicidal behavior, the strong association with early initiation, independent of other substance use and demographics, warrants attention in youth prevention programs.
What This Study Doesn't Tell Us
Cross-sectional design cannot establish causation. Retrospective recall of initiation age. Data from 2001-2003 may not reflect current cannabis landscape. Cannot control for all confounders (mental health history, trauma).
Questions This Raises
- ?Does early cannabis exposure disrupt neurodevelopmental processes that protect against suicidal behavior?
- ?Would the associations change with more recent data reflecting higher-potency cannabis?
Trust & Context
- Key Stat:
- 4.4x higher odds of suicide attempt with cannabis initiation before age 15
- Evidence Grade:
- Large national sample with appropriate controls, but cross-sectional design and retrospective recall limit causal inference.
- Study Age:
- Published in 2022 using survey data from 2001-2003.
- Original Title:
- Early Age of Cannabis Initiation and Its Association With Suicidal Behaviors.
- Published In:
- Substance abuse : research and treatment, 16, 11782218221116731 (2022)
- Authors:
- Ahuja, Manik(2), Awasthi, Manul, Gim, Suzanna, Records, Kathie, Cimilluca, Johanna, Al-Ksir, Kawther, Tremblay, Johnathan, Doshi, Riddhi P, Sathiyasaleen, Thiveya, Fernandopulle, Praveen
- Database ID:
- RTHC-03656
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
Is early cannabis use linked to suicide risk?
In this large study, starting cannabis before age 15 was associated with 4.4 times higher odds of suicide attempt and 3.3 times higher odds of suicidal ideation, significantly higher than later initiation.
Does starting later reduce the risk?
Later initiation (after age 14) was still associated with elevated risk (2.6x for attempt), but significantly less than early initiation (4.4x for attempt).
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-03656APA
Ahuja, Manik; Awasthi, Manul; Gim, Suzanna; Records, Kathie; Cimilluca, Johanna; Al-Ksir, Kawther; Tremblay, Johnathan; Doshi, Riddhi P; Sathiyasaleen, Thiveya; Fernandopulle, Praveen. (2022). Early Age of Cannabis Initiation and Its Association With Suicidal Behaviors.. Substance abuse : research and treatment, 16, 11782218221116731. https://doi.org/10.1177/11782218221116731
MLA
Ahuja, Manik, et al. "Early Age of Cannabis Initiation and Its Association With Suicidal Behaviors.." Substance abuse : research and treatment, 2022. https://doi.org/10.1177/11782218221116731
RethinkTHC
RethinkTHC Research Database. "Early Age of Cannabis Initiation and Its Association With Su..." RTHC-03656. Retrieved from https://rethinkthc.com/research/ahuja-2022-early-age-of-cannabis
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.