Table 1.

Characteristics of Randomized Trials of Peer Support Interventions for Depression

Study	N	% Female	Mean Age	Primary Study Inclusion criteria	Depression Outcome Measure	Peer Support Intervention	Control Condition(s)
Ayen I. et al, 2004	51	100	46–56 (range)	BDI > 13, no menstrual period in last 12 months	BDI	12 session weekly PSG	CBT, Usual care
Bright JI. et al, 1999	98	71	46	HSRD > 10	BDI, HRSD	10 session weekly PSG	CBT
Chen CH.et al, 2000	60	100	29	BDI > 9/10, post-partum	BDI	4–5 session weekly PSG	Usual care
Dennis CL., 2009	701	100	20–34 (median)	EPDS > 9, post-partum	EPDS	~10 weeks telephone peer mentor	Usual care
Evans RL. et al, 1995	78	32	54	CES-D > 15, stage II cancer with planned XRT	CES-D	8 session weekly PSG	CBT, Usual care
Kelly JA. et al, 1993	68	0	34	CES-D > 15, HIV positive	CES-D	8 session weekly PSG	CBT, Usual care
Maynard CK. et al, 1993	34	100	45	Depressed women (self-identified)	BDI	12 session weekly PSG	CBT, Usual care*
Michielin P. et al, 2007	40	Not reported	56–59	BDI > 9, caregiver for someone with serious mental illness	BDI	10 session PSG over 15 weeks	CBT
Ong Y. et al, 1987	20	85	74	Depressed elderly patients (Feighner research criteria) following inpatient stay	Zung depression scale	9 months weekly PSG	Usual care
Verduyn C. et al, 2003	119	100	30	BDI > 14, mother of pre-school aged child	BDI, HRSD	16 session weekly PSG	CBT, Usual care

PSG = Peer support group, CBT = group cognitive behavioral therapy, BDI = Beck Depression Inventory, CES-D = Center for Epidemiological Studies Depression scale

EPDS = Edinborough Postpartum Depression Scale, HRSD = Hamilton Rating Scale for Depression, HRSD = Hamilton Rating Scale for Depression

^*Patients were not randomized to this condition and therefore it was excluded from the meta-analyses