. 2022 Dec 1;53(3):668–686. doi: 10.1017/S0033291722003634

Table 1.

Number of studies and sample sizes by treatment and study characteristics

	# studies		N		# studies		N	# studies	N
Setting^a	Outpatient				Day-treatment			Inpatient
	83		4938		15		1158	17	3004
Format^a	Individual + Group				Individual			Group
	74		6595		43		1652	13	853
Study design	Open Trial				RCT			Non-randomized controlled
	58		5008		44		3397	9	695
Add-on to TAU^a	Not added to TAU				Added to TAU
	110		8853		7		247
Medication	Not prescribed				Prescribed
	106		8946		5		154
Dropout type	Treatment dropout distinguished from Study dropout				Study and treatment dropout not distinguished
	90		7775		21		1325
Dropout per Quarter^b	Completely reported				Partially reported			Not reported
	87		7232		7		483	20	1385
Country group	Europe			USA		Australia/Canada/NewZealand			Emerging
	48	4781		27	1089	6		418	418	341

Note that some studies investigated multiple settings/formats/models. Hence, #studies >111 in these rows.

Note that some studies had complete dropout reports for one arm, but not or partially reported for another arm. Hence, #studies >111 in this row.