Table 6.

Methodological criteria fulfillment of the reviews (n = 84)

Search method		Selection method		Analysis method		Synthesis method
	n =		n =		n =		n =
Statement of used databases (PRISMA item 7)	78 (93 %)	Statement of inclusion and/or exclusion criteria (PRISMA item 6)	68 (81 %)	Statement of identification of information unit (e.g., definition of what information is to be extracted) (PRISMA item 10)	55 (66 %)	Statement/description of a synthesis method (PRISMA item 14)	48 (57 %)
Statement of date/period of the search(es) (PRISMA item 7)	23 (27 %)
		Statement of the selection procedure (e.g., who was selected and how) (PRISMA item 9)	29 (35 %)
						Statement of procedure of (employing the) synthesis method (e.g., one or two people, dialogical processes) (PRISMA item 14)	15 (18 %)
Statement of used search terms and/or search strings (PRISMA item 8)	76 (91 %)			Statement of the procedure of information extraction (PRISMA item 10)	31 (37 %)
		Representation of search procedure as a flowchart (PRISMA item 17)	24 (29 %)
Statement of used search restrictions (e.g., publication dates, languages) (PRISMA item 8)	50 (59 %)
						Statement of found/included study/paper characteristics (PRISMA item 18)	45 (54 %)
				Statement of the kind of theoretical (ethical) approaches used for defining information units (PRISMA item 11)	21 (25 %)
How many hits found (PRISMA item 17)	50 (59 %)	How many hits included (PRISMA item 17)	63 (75 %)
						Illustration/representation of a synthesis result (PRISMA item 21)	63 (75 %)
Statement of additional search strategies used (additional criteria)	50 (59 %)
No criteria fulfilled	1 (1 %)	No criteria fulfilled	7 (8 %)	No criteria fulfilled	26 (31 %)	No criteria fulfilled	8 (10 %)
All criteria fulfilled	7 (8 %)	All criteria fulfilled	18 (21 %)	All criteria fulfilled	7 (8 %)	All criteria fulfilled	9 (11 %)