The most recent evidence is a literature review by Kirsh et al (2019) that concludes a more developed evidence-base is needed. This question has been partially addressed in the evidence base.
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Birgitta Gunnarsson, A., et al. (2018). "Treatment of depression and/or anxiety—Outcomes of a randomised controlled trial of the Tree Theme Method® versus regular occupational therapy." BMC Psychology 6.
D'Amico, M. L., et al. (2018). "Evidence for interventions to improve and maintain occupational performance and participation for people with serious mental illness: A systematic review." American Journal of Occupational Therapy 72(5).
Doroud, N., et al. (2015). "Recovery as an occupational journey: A scoping review exploring the links between occupational engagement and recovery for people with enduring mental health issues." Australian Occupational Therapy Journal 62(6): 378-392.
Eklund, M., et al. (2017). "Effectiveness of Balancing Everyday Life (BEL) versus standard occupational therapy for activity engagement and functioning among people with mental illness—A cluster RCT study." BMC Psychiatry 17.
Engelbrecht, R., et al. (2019). "The effect of an occupational therapy mental health day treatment centre on the use of inpatient services in the Western Cape, South Africa." Disability & Rehabilitation 41(16): 1974-1980.
Fontaine, B. N., et al. (2019). "Bridging the Gap Between Hospital and Community-Based Mental Health Services." Occupational Therapy in Mental Health 35(2): 157-178.
Fox, J., et al. (2019). "A systematic review and narrative synthesis of occupational therapy-led interventions for individuals with anxiety and stress-related disorders." Occupational Therapy in Mental Health 35(2): 179-204.
Gutman, S. A. and T. Brown (2018). "A Bibliometric Analysis of the Quantitative Mental Health Literature in Occupational Therapy." Occupational Therapy in Mental Health 34(4): 305-346.
Höhl, W., et al. (2017). "Occupational therapy interventions in the treatment of people with severe mental illness." Current Opinion in Psychiatry 30(4): 300-305.
Ikiugu, M. N., et al. (2017). "Clinical effectiveness of occupational therapy in mental health: A meta-analysis." American Journal of Occupational Therapy 71(5): 9.
Kirsh, B., et al. (2019). "Occupational Therapy Interventions in Mental Health: A Literature Review in Search of Evidence." Occupational Therapy in Mental Health 35(2): 109-156.
Lannigan, E. G. and S. Noyes (2019). "Occupational Therapy Interventions for Adults Living With Serious Mental Illness." The American Journal Of Occupational Therapy: Official Publication Of The American Occupational Therapy Association 73(5): 7305395010p7305395011-7305395010p7305395015.
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Petersen, K. S., et al. (2019). "Occupational therapy interventions in mental health: a scoping review of recent evidence." International Journal of Therapy & Rehabilitation 26(9): 1-21.
Read, H., et al. (2018). "Early intervention in mental health for adolescents and young adults: A systematic review." American Journal of Occupational Therapy 72(5): 1-8.
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