1. Collaborative care components of included studies (based on Gunn 2006 definition).

	Multi‐professional approach				Structured management plan	Follow‐ups	Enhanced interprofessional communication	No. components
	Primary care professional	Mental health professional	Case manager	Other
Bauer 2006	None	Psychiatrist	Nurse	N/A		At least 1 appointment every 3 months		3
Chatterjee 2011	None	Psychiatrist Psychiatric social worker	Nurse	Community health workers	Medication management Psycho‐education/health promotion	6 to 8 visits at home in months 0 to 3; 6 to 8 fortnightly visits in months 4 to 7; 6 visits in months 8 to 12	Clinical team reviews	3
Chwastiak 2018	Advanced practice registered nurse	Community Mental Health Centre (CMHC) psychiatrist CMHC nurse		Endocrinologist consultant	Health plan Motivational interviewing and behavioural activation Medication management	60‐minute health assessment; 30‐minute visits every other week for 12 weeks; then monthly visits for up to 6 months	Intra‐clinic communication Clinical meetings Caseload review	4
Kilbourne 2012	None	Social worker interventionist	Nurse	N/A	Evidence‐based guidelines Self‐management support	20‐minute contacts for up to 6 months		3
Kilbourne 2013	None	Mental health providers	Health specialist	General medical providers	Evidenced‐based guidelines	4 x 2‐hour weekly group self‐management sessions and brief care management contacts for up to 6 months		3
Mishra 2017	None	Psychiatrist Hospital pharmacist	None	N/A	Medication management	3 appointments	None	3
Salman 2014	None	Psychiatrist Psychologist Hospital pharmacist	NR	N/A	Medication management	Contact every 2 weeks, via telephone and clinic appointments. Clinic visits scheduled on weeks 2, 6, 12 and 24.	Daily meetings	3
van der Voort 2015	None	Psychiatrist Mental health nurse	Mental health nurse	N/A	Treatment plan Psychoeducation Problem‐solving treatment	Psychoeducation 6 x 2‐hour sessions Problem solving training x 6 sessions; other pharmacotherapy + somatic care 'continues as appropriate'	Meetings	3

CMHC: community mental health care clinic; N/A: not applicable; NR: not reported