Evidence map›Paper›PMID 32546286›Full record

Observational studyPsychological medicine2022

Cannabis use and posttraumatic stress disorder: prospective evidence from a longitudinal study of veterans.

Jane Metrik, Angela K Stevens, Rachel L Gunn, Brian Borsari, Kristina M Jackson

Open access · greenAbstract readObservational Study
In one paragraph

Observational study in Psychological medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
3.6field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 50 citations in OpenAlex.

  1. Article
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  6. Understanding the Role of Endocannabinoids in Posttraumatic Stress Disorder.International journal of molecular sciences · 2025
    Review
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  15. Cannabis demand and use among veterans: A prospective examination.Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors · 2023
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Jane MetrikProvidence VA Medical Center, Providence, RI 02908, USA.ORCID 0000-0001-9727-3838
Angela K StevensCenter for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, RI 02903, USA.
Rachel L GunnCenter for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, RI 02903, USA.
Brian BorsariSan Francisco VA Health Care System, San Francisco, CA 94121, USA.
Kristina M JacksonCenter for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, RI 02903, USA.
Brown University · USUniversity of California, San Francisco · US

Funding

ALCOHOL INTERVENTION/TREATMENT OUTCOME RESEARCH TRAININGT32AA007459 · NIAAA · BROWN UNIVERSITY · PI ROBERT MIRANDA, PETER M. MONTI · 1986 to 2026
$13.3M
Marijuana use, problems, and cannabis use disorders in OIF/OEF/OND veteransR01DA033425 · NIDA · BROWN UNIVERSITY · PI BORSARI, BRIAN, METRIK, JANE · 2012 to 2015
$1.1M
NIAAA NIH HHS T32 AA007459NIDA NIH HHS R01 DA033425
6 · The paper itself

Abstract

backgroundPosttraumatic stress disorder (PTSD) is the most highly co-occurring psychiatric disorder among veterans with cannabis use disorder (CUD). Despite some evidence that cannabis use prospectively exacerbates the course of PTSD, which in turn increases the risk for CUD, the causal nature of the relationship between cannabis and psychiatric comorbidity is debated. The longitudinal relationship between PTSD diagnosis and traumatic intrusion symptoms with cannabis use and CUD was examined using cross-lagged panel model (CLPM) analysis.

methodsProspective data from a longitudinal observational study of 361 veterans deployed post-9/11/2001 included PTSD and CUD diagnoses, cannabis use, and PTSD-related traumatic intrusion symptoms from the Inventory of Depression and Anxiety Symptoms.

resultsA random intercept CLPM analysis that leveraged three waves (baseline, 6 months and 12 months) of cannabis use and PTSD-related intrusion symptoms to account for between-person differences found that baseline cannabis use was significantly positively associated with 6-month intrusion symptoms; the converse association was significant but reduced in magnitude (baseline use to 6-month intrusions: β = 0.46, 95% CI 0.155-0.765; baseline intrusions to 6-month use: β = 0.22, 95% CI -0.003 to 0.444). Results from the two-wave CLPM reveal a significant effect from baseline PTSD to 12-month CUD (β = 0.15, 95% CI 0.028-0.272) but not from baseline CUD to 12-month PTSD (β = 0.12, 95% CI -0.022 to 0.262).

conclusionsStrong prospective associations capturing within-person changes suggest that cannabis use is linked with greater severity of trauma-related intrusion symptoms over time. A strong person-level directional association between PTSD and CUD was evident. Findings have significant clinical implications for the long-term effects of cannabis use among individuals with PTSD.

Indexed as

CannabisMarijuana AbuseStress Disorders, Post-TraumaticVeteransHumansLongitudinal StudiescannabisCannabis use disorderPTSDtraumaveterans

Identifiers

PMID32546286
PMCPMC9882422
OpenAlexW3035672012

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.