Clinical Takeaway
Insomnia symptoms present before a traumatic event may increase the risk of developing problematic alcohol or cannabis use in the weeks and months following trauma exposure. This relationship appears to be partially mediated by early posttraumatic stress symptoms, suggesting that treating pre-existing sleep disturbances may help reduce downstream substance use risk in trauma survivors.
#10 Pre-trauma insomnia and posttraumatic alcohol and cannabis use in the AURORA observational cohort study of trauma survivors.
Citation: 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. PMID: 40582081.
Design: 2 Journal: 0 N: 4 Recency: 2 Pop: 2 Human: 1 Risk: 0
Pre-trauma insomnia represents a modifiable risk factor that clinicians can identify and target to prevent problematic alcohol and cannabis use in the critical post-trauma period, when substance use trajectories are being established. Understanding this temporal relationship enables earlier intervention in trauma survivors at highest risk for maladaptive coping through substance use. This finding supports integrating sleep-focused interventions into acute trauma care protocols as a potential strategy to reduce downstream substance use disorders in this vulnerable population.
Methodological Considerations:
- Self-reported outcomes — recall and social-desirability bias risk
Abstract: BACKGROUND AND AIMS: Insomnia symptoms are a potential risk factor for alcohol and cannabis use, particularly in trauma-exposed populations. The initial weeks and months after trauma are a period of risk for problematic substance use, however prior research has not examined whether insomnia symptoms predict alcohol or cannabis use after trauma. DESIGN: Using a large-scale, multi-site, prospective study of trauma survivors presenting to emergency departments (EDs), the current study tested direct and indirect associations between pre-trauma insomnia symptoms, two-week posttraumatic stress disorder (PTSD) symptoms, and eight-week post-trauma heavy alcohol and cannabis use and binge drinking. SETTING: Participants were recruited from 23 EDs in the United States and followed up using remote assessments. PARTICIPANTS/CASES: Participants were from the AURORA study (n = 2449). A slight majority were women (63.8 %) and were an average of 37 years old. Participants were racially and ethnically diverse (50.5 % Black, 11.2 % Hispanic). MEASUREMENTS: Participants completed self-report measures during their ED visit, and two- and eight-weeks post-trauma. FINDINGS: Pre-trauma insomnia symptoms significantly predicted eight-week post-trauma heavy alcohol and cannabis use, as well as binge drinking. Associations persisted after covarying for pre-trauma substance use, demographic variables, and trauma severity at the time of emergency care. Further, the association between pre-trauma insomnia symptoms and heavy alcohol and cannabis use at eight-weeks post-trauma was significantly mediated by two-week PTSD symptoms. CONCLUSIONS: Insomnia symptoms may be an important malleable risk factor for heavy alcohol and cannabis use and binge drinking after trauma. Further research is needed to explore the effectiveness of insomnia interventions to mitigate post-trauma substance use and to better understand the complex relationships between sleep, trauma, PTSD, and substance use.
? This prospective cohort study from AURORA provides useful observational evidence that pre-trauma insomnia may be a meaningful risk factor for subsequent alcohol and cannabis use in trauma survivors, a population particularly vulnerable to maladaptive coping patterns during the critical post-trauma window. However, several important limitations warrant caution in clinical interpretation: the observational design cannot establish causation, unmeasured confounders (such as underlying anxiety, depression, or trauma severity) likely influence both insomnia and substance use trajectories, and the study cannot distinguish whether insomnia itself drives substance use or whether shared neurobiological vulnerabilities explain both outcomes. Additionally, we should note that insomnia is an extremely common post-trauma symptom, so screening for insomnia alone would lack specificity for identifying high-risk individuals. Clinically, this work reinforces the importance of proactively assessing and treating sleep disturbance in trauma survivors presenting to emergency care, not only for its own sake but as part of a comprehensive approach to prevent substance
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