What topics does this cannabis study cover?

This study covers research on: Addiction, Mental Health, Anxiety.

Where was this research published?

Published in Journal of behavioral addictions on September 15, 2026.

Cannabis symptoms linked to mental health through shared factors

Q: What did this research study find?

In **6,646** Canadian postsecondary students, *addiction* and mental-health symptoms were most often connected through indirect links involving psychological factors, rather than through direct symptom-to-symptom associations.

Addictions are linked but distinct: A transdiagnostic network analysis of concurrent disorder risk.

Journal of behavioral addictions • September 15, 2026 • Moderately Relevant

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AI Summary

This observational study examined how symptoms of addictions—including cannabis, alcohol, nicotine, gambling, and video-game problems—relate to symptoms of depression, anxiety, PTSD, and ADHD in 6,646 Canadian postsecondary students. Researchers used pairwise Markov random-field network models to assess whether cognitive and social factors, such as coping motives, impulsivity, emotion regulation, resilience, and social support, connected addiction symptoms with mental-health symptoms. This was a self-report study, not a clinical trial, and it did not test a cannabis product or treatment.

The strongest reported links between addiction and mental-health symptoms were usually indirect, operating through psychological factors. Some factors—especially coping motives, impulsive urgency, and low social support—were associated with both behavioral and substance-related addictions, while discrimination and adverse childhood experiences were among factors that were not shared across all addiction types. Symptom patterns differed more between individuals than between specific substances, and the network factors explained 13%–63% of the variation in symptom severity. The most consequential limitation is that the modeled factors did not explain most of the variability in addiction symptoms, so this abstract cannot establish causation, identify cannabis-specific effects, or show that changing any factor would prevent or treat concurrent disorders. This is an abstract-based summary; the full text was not reviewed.

💡 Key Findings

In 6,646 Canadian postsecondary students, addiction and mental-health symptoms were most often connected through indirect links involving psychological factors, rather than through direct symptom-to-symptom associations.

High

80%

Coping motives, impulsive urgency, and low social support were factors shared by behavioral and substance-related addictions, while discrimination and adverse childhood experiences were among factors that differed across addiction types.

Good

75%

The factors included in the network explained 13%–63% of variation in disorder symptom severity, meaning they did not account for most of the variability in addiction symptoms.

High

85%

Differences in addiction symptoms were reported to vary more between individuals than between specific substances, so the findings do not establish a distinct cannabis-specific mechanism.

Good

70%

📄 Original Abstract

BACKGROUND AND AIMS: Concurrent disorder refers to the co-occurrence of one or more addictive disorder(s) alongside one or more other mental health disorder(s). To identify psychotherapy targets most-closely related to concurrent disorders, we modeled addiction and mental health symptom severities alongside relevant cognitive psychological factors using pairwise Markov random fields. METHODS: Canadian postsecondary students (N = 6,646) self-reported symptoms of addictive disorders related to legally-available products (alcohol, nicotine, cannabis, gambling, or video games), symptoms of commonly co-occurring mental health concerns (depression, anxiety, Post-Traumatic Stress Disorder, and attention-deficit/hyperactivity disorder), and correlated cognitive psychological factors identified by previous research (motives, impulsivity, emotion dysregulation, and those relating to difficult life events [resilience, self-efficacy, perceived social support, experiences of discrimination and adverse childhood experiences]). For these, network models were fit examining addiction symptoms jointly, individually, and separately for product types and classes. RESULTS: Significant correlations between addiction and mental health symptoms were most often attributable to indirect links via psychological factors. Behavioural addiction symptoms were linked to mental health symptoms via psychological factors both shared (coping motives, impulsive urgency, and lack of social support) and not shared (e.g., discrimination, adverse childhood experiences) with substance-related addictions. Differences between addiction symptoms relevant to specific products varied more between individuals than between substances. Disorder symptom severities were differently accounted-for by network factors (R2adj = .13-.63). DISCUSSION AND CONCLUSIONS: Despite identifying several mechanisms of concurrence between mental health and addictions, modeled psychological factors do not account for most variability in addiction symptom severity.

Paper Type

📄 Research

Publication

Journal: Journal of behavioral addictions
Published: September 15, 2026
PMID: 42742968
DOI: 10.1556/2006.2026.00050

Authors (8)

Spencer Murch 1Department of Psychology, University of Calgary, Calgary, Alberta, Canada.
Samantha J Dawson 2Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada.
David C Hodgins 1Department of Psychology, University of Calgary, Calgary, Alberta, Canada.
Matthew T Keough 3Department of Psychology, York University, Toronto, Ontario, Canada.
Daniel S McGrath 1Department of Psychology, University of Calgary, Calgary, Alberta, Canada.
+3 more authors