Pre-Trauma Insomnia Predicted Heavier Cannabis Use After Traumatic Events
People with insomnia symptoms before experiencing trauma were more likely to use cannabis heavily at 8 weeks post-trauma, partly mediated by early PTSD symptoms.
Quick Facts
What This Study Found
Pre-trauma insomnia symptoms significantly predicted heavy cannabis use at 8 weeks post-trauma, even after controlling for pre-trauma substance use, demographics, and trauma severity. Two-week PTSD symptoms significantly mediated this relationship.
Key Numbers
2,449 participants from 23 EDs. 63.8% women, mean age 37. 50.5% Black, 11.2% Hispanic. Pre-trauma insomnia predicted 8-week heavy cannabis use, heavy alcohol use, and binge drinking. Two-week PTSD symptoms mediated the insomnia-to-cannabis pathway.
How They Did This
Prospective cohort from the AURORA study (n=2,449) recruited from 23 US emergency departments. Participants completed self-report measures during their ED visit and at 2 and 8 weeks post-trauma. Path analysis tested direct and mediated associations between pre-trauma insomnia, PTSD symptoms, and substance use.
Why This Research Matters
Understanding modifiable risk factors for post-trauma substance use could help identify intervention targets. If treating insomnia before or shortly after trauma reduces subsequent substance use, it could change early intervention approaches.
The Bigger Picture
This study positions insomnia as a potentially modifiable upstream risk factor for post-trauma substance use. However, self-reported pre-trauma insomnia collected after trauma exposure may be subject to recall bias.
What This Study Doesn't Tell Us
Pre-trauma insomnia was assessed retrospectively during the ED visit, introducing potential recall bias. Cannabis use was self-reported. Only 8-week follow-up, so longer-term patterns are unknown. Observational design cannot establish causation.
Questions This Raises
- ?Could treating insomnia early after trauma reduce subsequent cannabis use?
- ?Do these patterns persist beyond 8 weeks post-trauma?
Trust & Context
- Key Stat:
- Evidence Grade:
- Large multi-site prospective design with well-characterized cohort, though retrospective insomnia assessment and short follow-up limit evidence to moderate.
- Study Age:
- Data from the ongoing AURORA study of trauma survivors.
- Original Title:
- Pre-trauma insomnia and posttraumatic alcohol and cannabis use in the AURORA observational cohort study of trauma survivors.
- Published In:
- Journal of psychiatric research, 189, 415-423 (2025)
- Authors:
- Short, Nicole A(5), Ellis, Robyn A, Pezza, Mattea(2), House, Stacey L, Beaudoin, Francesca L, An, Xinming, Clifford, Gari D, Jovanovic, Tanja, Linnstaedt, Sarah D, Rauch, Scott L, Haran, John P, Storrow, Alan B, Lewandowski, Christopher, Musey, Paul I, Hendry, Phyllis L, Sheikh, Sophia, Jones, Christopher W, Punches, Brittany E, Hudak, Lauren A, Pascual, Jose L, Seamon, Mark J, Pearson, Claire, Peak, David A, Merchant, Roland C, Domeier, Robert M, Rathlev, Niels K, O'Neil, Brian J, Sanchez, Leon D, Bruce, Steven E, Harte, Steven E, Kessler, Ronald C, Koenen, Karestan C, Ressler, Kerry J, McLean, Samuel A, Neylan, Thomas C
- Database ID:
- RTHC-07647
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
How was pre-trauma insomnia measured?
Participants reported their insomnia symptoms during their emergency department visit, recalling sleep patterns from before the traumatic event.
Why does insomnia lead to more cannabis use after trauma?
The study found that early PTSD symptoms partly explained this link, suggesting insomnia may worsen PTSD responses, which in turn increase substance use as a coping mechanism.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-07647APA
Short, Nicole A; Ellis, Robyn A; Pezza, Mattea; House, Stacey L; Beaudoin, Francesca L; An, Xinming; Clifford, Gari D; Jovanovic, Tanja; Linnstaedt, Sarah D; Rauch, Scott L; Haran, John P; Storrow, Alan B; Lewandowski, Christopher; Musey, Paul I; Hendry, Phyllis L; Sheikh, Sophia; Jones, Christopher W; Punches, Brittany E; Hudak, Lauren A; Pascual, Jose L; Seamon, Mark J; Pearson, Claire; Peak, David A; Merchant, Roland C; Domeier, Robert M; Rathlev, Niels K; O'Neil, Brian J; Sanchez, Leon D; Bruce, Steven E; Harte, Steven E; Kessler, Ronald C; Koenen, Karestan C; Ressler, Kerry J; McLean, Samuel A; Neylan, Thomas C. (2025). Pre-trauma insomnia and posttraumatic alcohol and cannabis use in the AURORA observational cohort study of trauma survivors.. Journal of psychiatric research, 189, 415-423. https://doi.org/10.1016/j.jpsychires.2025.06.027
MLA
Short, Nicole A, et al. "Pre-trauma insomnia and posttraumatic alcohol and cannabis use in the AURORA observational cohort study of trauma survivors.." Journal of psychiatric research, 2025. https://doi.org/10.1016/j.jpsychires.2025.06.027
RethinkTHC
RethinkTHC Research Database. "Pre-trauma insomnia and posttraumatic alcohol and cannabis u..." RTHC-07647. Retrieved from https://rethinkthc.com/research/short-2025-pretrauma-insomnia-and-posttraumatic
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.