Virtual Collaborative Care Versus Specialty Psychiatry Treatment for Depression or Anxiety

Kathryn K. Ridout, MD, PhD ; Mubarika Alavi, MS ; Catherine Lee, PhD ; Lisa Fazzolari, DO ; Samuel J. Ridout, MD, PhD ; Maria T. Koshy, MD ; Brooke Harris, PhD ; Sameer Awsare, MD ; Constance M. Weisner, DrPH ; Esti Iturralde, PhD

J Clin Psychiatry 2024;85(3):24m15332

Abstract

Objective: While collaborative care is known to improve depressive and anxiety symptoms in primary care, comparative effectiveness studies of virtual collaborative care versus virtual specialty psychiatry treatment in real world settings are lacking. This study examined patient depressive and anxiety symptoms over 6 months in collaborative care versus specialty psychiatry.

Methods: This was an observational study with target trial emulation in a large, community-based, integrated health care system. Participants were ≥18 years old with mild-moderate depressive or anxiety symptoms measured by the Patient Health Questionnaire-9 or Generalized Anxiety Disorder-7 Scale. Exclusion criteria included acute suicide risk. Patients were assigned to collaborative care or specialty psychiatry, and symptoms were measured 6 months after treatment initiation using linear mixed-effects regression with inverse probability of treatment weighting.

Results: There were N = 10,380 patients (n = 1,607 in collaborative care; n = 8,773 in specialty psychiatry) with depressive disorders and N = 2,935 (n = 570 in collaborative care; n = 2,365 in specialty psychiatry) with anxiety disorders. Model effects at 6 months showed significant symptom improvement for patients in collaborative care (adjusted mean difference [AMD] = −9.0, 95% CI, −9.7, −8.4 for depression; −5.4, 95% CI, −6.2, −4.7 for anxiety) and in specialty psychiatry (AMD = −5.0, 95% CI, −5.6, −4.5 for depression; −2.8, 95% CI, −3.6, −2.1 for anxiety), with patients in collaborative care showing significantly greater improvement compared to those in specialty psychiatry (AMD = −4.0, 95% CI, −4.7, −3.3, P < .0001 for depression; AMD = −2.6, 95% CI, −3.4, −1.8, P < .0001 for anxiety).

Conclusions: Virtual collaborative care was at least as effective as specialty psychiatry for depression and anxiety. Collaborative care implementation can support national guidelines regarding depression and anxiety screening and treatment.

J Clin Psychiatry 2024;85(3):24m15332

Author affiliations are listed at the end of this article.

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