Table 1.

Aggregated characteristics of the included studies

			N (M)	% (SD)
Trial characteristics (k = 300)
Antidepressant use (M, SD)			(41.1)	(38.8)
Mean age (M, SD)			(44.6)	(14.0)
Proportion women (M, SD)			(0.72)	(0.20)
Diagnosis		Diagnosed depressive disorder	189	63.0
		Above cut-off	96	32.0
		Subthreshold depression	15	5.0
Target group		Adults	136	45.3
		General medical patients	65	21.7
		Older adults	25	8.3
		Perinatal depression	25	8.3
		College students	13	4.3
		Other specific target group	36	12.0
Recruitment		Clinical	101	33.7
		Community	120	40.0
		Other	79	26.3
Control		Care-as-usual	121	40.3
		Other control	38	12.7
		Pharmacotherapy	51	17.0
		Waitlist	90	30.0
Country		US	99	33.0
		Europe	74	24.7
		Australia	14	4.7
		Canada	18	6.0
		East Asia	32	10.7
		UK	36	12.0
		Other	27	9.0
Low risk of bias		Sequence generation	186	62.0
		Allocation concealment	151	50.3
		Blinded assessmenta	278	92.3
		Intention to treat	200	66.3
Total risk of bias		0	9	3.0
		1	56	18.7
		2	57	19.0
		3	71	23.7
		4	107	35.7
Intervention characteristics (k = 353)
Therapy		Cognitive behavior therapy	175	49.6
		Third wave therapy	30	8.5
		Behavioral activation therapy	24	6.8
		Psychodynamic therapy	10	2.8
		Interpersonal psychotherapy	31	8.8
		Life review therapy	10	2.8
		Problem-solving therapy	20	5.7
		Other	53	15.0
Format		Individual	151	42.8
		Group	101	28.6
		Guided self-help	56	15.9
		Telephone	17	4.8
		Other/mixed	28	7.9
N sessions (M, SD)			(10.3)	(8.0)

^aThis includes 154 studies that used only self-report measures.