Table 2. Summary of study characteristics across the 198 studies included in the network meta-analysis.

Descriptive Categories	Study Characteristic	Number of Studies	Percent
Patient population	Regular depression	94	47%
	Geriatric depression	26	13%
	Student populations	8	4%
	Women with postpartum depression	16	8%
	General medical patients with depression	27	14%
	Miscellaneous	27	14%
Psychotherapeutic intervention a	Interpersonal therapy	27	14%
	Behavioural activation	26	13%
	Cognitive-behavioural therapy	139	70%
	Problem solving therapy	19	10%
	Social skills training	7	4%
	Psychodynamic therapy	16	8%
	Supportive counselling	37	19%
Control condition b	Placebo	27	14%
	Usual care	60	30%
	Waitlist	75	38%
Intervention format and setting	Individual and face-to-face	97	49%
	Other	98	50%
	Mixed	2	1%
Country	United States	115	58%
	United Kingdom	23	11%
	Continental Europe	27	13%
	Canada	8	4%
	Australia	13	6%
	Miscellaneous	15	8%

^aThe percentages do not add up to 100% because many studies contained more than one treatment.

^bThe percentages do not add up to 100% because not all studies contained a control condition.