Table 1.

Basic characteristics of the included studies (N=31).^a

Parameter			Total, n (%)		References
Study design
	Qualitative	10 (32)		[12,15,16,18,21-23,39,50,51]
	Survey	9 (29)		[5,13,14,17,40,43,45,48,49]
	Mixed method	4 (13)		[20,46,47,55]
	Descriptive	2 (6)		[53,54]
	Cohort	2 (6)		[41,52]
	Intervention	4 (13)		[19,42,44,56]
	Randomized controlled trial	1 (3)		[44]
Publication year
	2012-2014	1 (3)		[44]
	2015-2017	6 (19)		[13,15,19,39,47,56]
	2018-2020	18 (58)		[5,14,16-18,20-22,40-43,45,46,49,52-54]
	2021 and onwards	6 (19)		[12,23,48,50,51,55]
Country
	Australia	1 (3)		[21]
	Canada	3 (10)		[20,45,56]
	Netherlands	1 (3)		[23]
	Norway	3 (1)		[5]
	Sweden	5 (16)		[14,16,17,50,55]
	United Kingdom	2 (6)		[47,51]
	United States	8 (58)		[12,13,15,18,19,22,39-44,46,48,49,52-54]
Study participants
	Service users	17 (55)		[19,23,39-41,43-49,51-54,56]
	Veterans	5 (16)		[39-41,43,52]
	Health care professionals	16 (53)		[5,13-23,42,53-55]
	Relatives	1 (3)		[45]
	Policy stakeholders	2 (6)		[12,50]
Treatment setting
	Inpatient	11 (35)		[5,14,16,17,23,45,47,50,52,55,56]
	Outpatient	29 (94)		[5,13-23,39-50,52-56]
	Not applicable	1 (3)		[51]
Clinical field
	Psychotherapy	4 (13)		[18,46,53,54]
	Psychiatry	13 (42)		[5,14,16,17,19,20,23,45,47,48,50,55,56]
	Veterans Affairs Mental Health	9 (29)		[13,15,22,39-43,52]
	Somatic (General practitioner, Primary Care and other)	6 (19)		[5,21,44,48,49,51]
	Not applicable	1 (3)		[12]

^aIndividual papers can be assigned to the various subparameters at the same time, which means that percentages of over 100% can be achieved.