The DSM-5 definition of cannabis use disorder and its severity levels were supported by their associations with cannabis use patterns, psychiatric disorders, and social impairment, with severe CUD showing the strongest validity.
Clinicians diagnosing cannabis use disorder and researchers studying its classification.
Severe CUD linked to psychiatric disorders and social impairment; mild/moderate were not
What the researchers found
DSM-5 CUD and all severity levels were associated with cannabis use validators (days used, self-reported problem use, craving). Severe CUD was additionally associated with other psychiatric disorders and social impairment. Mild and moderate CUD were associated only with cannabis-specific validators, supporting them as clinically distinct from severe CUD.
Why it matters
The DSM-5 changed how cannabis use disorder is diagnosed (combining abuse and dependence, adding withdrawal and craving). Validating these changes ensures clinicians are using a meaningful diagnostic framework.
The numbers in context
392 past-year cannabis users. Severe CUD associated with validators across all domains (cannabis use, psychiatric, social). Mild and moderate CUD associated with cannabis-specific validators only.
How the study worked
Study of 392 past-year cannabis users with problematic substance use recruited from a research setting and an inpatient treatment program. Semi-structured clinician-administered diagnostic interviews assessed DSM-5 CUD. Regression models tested associations with validators across cannabis use, psychopathology, and functional impairment domains.
What this study cannot tell us
Sample recruited from clinical and research settings, not the general population. Cross-sectional design cannot assess predictive validity. Predominantly problematic substance users.
How to read the evidence
Clinician-administered diagnostic interviews with appropriate validators, but clinical sample limits generalizability.
When this study was published
Published in 2022.
The bigger picture
The distinction between severity levels has practical implications: severe CUD likely requires intensive treatment addressing psychiatric and social functioning, while mild/moderate CUD may benefit from prevention and brief intervention.
Questions still open
- Do mild and moderate CUD predict progression to severe CUD over time? Would severity-matched treatments improve outcomes?
Common questions
What changed from DSM-IV to DSM-5 for cannabis disorders?
When does cannabis use disorder become "severe"?
Read the original research
Construct validity of DSM-5 cannabis use disorder diagnosis and severity levels in adults with problematic substance use.
Journal of psychiatric research, 155, 387-394
Citation
Fink, David S; Shmulewitz, Dvora; Mannes, Zachary L; Stohl, Malka; Livne, Ofir; Wall, Melanie; Hasin, Deborah S. (2022). Construct validity of DSM-5 cannabis use disorder diagnosis and severity levels in adults with problematic substance use.. Journal of psychiatric research, 155, 387-394. https://doi.org/10.1016/j.jpsychires.2022.09.016
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