Cannabis use tied to higher psychiatric care needs in veterans

This study examined a collaborative care model (CCM) for treating depression and anxiety in a primary care setting at the Tampa Veterans' Affairs medical center. Researchers analyzed 757 veterans enrolled in an antidepressant monitoring program over 18 months to identify which patients might need referral to specialty psychiatric services. The findings reveal that only 17.3% of patients required higher-level psychiatric care, suggesting the primary care model was effective for most individuals. However, the study identified several baseline characteristics that predicted when patients would need additional specialist support.

The research found that four key factors were significantly associated with referral to specialty mental health services: higher baseline depression severity scores, sleep issues at enrollment, alcohol use disorder, and importantly, cannabis use disorder. Veterans with cannabis use disorder were among those most likely to require escalation to specialty psychiatric care, suggesting that cannabis use patterns are an important clinical indicator when assessing depression and anxiety treatment in primary care settings. This finding highlights the complex relationship between cannabis use and mental health conditions, particularly in veteran populations who may use cannabis as self-medication for anxiety or depression.

These results have important implications for healthcare providers treating mental health conditions in primary care. The identification of specific risk factors—including cannabis use disorder—can help clinicians better predict which patients will need specialist intervention and potentially develop proactive treatment strategies to prevent escalation. The researchers emphasize that further studies are needed to develop interventions that can keep more patients stable in primary care settings and reduce the need for costly specialty psychiatric referrals, especially for those with co-occurring substance use challenges.