Table 1.

Critical appraisal using the Critical Appraisal Skills Programme (CASP) checklist for qualitative research

	CASP questions
Study	1	2	3	4	5*	6	7	8*	9*	10	Quality rating	Comments
De Vleminck et al23	x	x	x	x	x	?	x	x	x	x	H
Fuat et al24	x	x	x	x	x	x	/	x	x	x	H
Kasje et al18	x	x	/	/	/	/	/	x	/	x	L	Exclusion
Khunti et al25	x	x	x	x	x	x	x	x	x	x	H
Peters-Klimm et al19	x	x	x	x	/	/	/	x	/	/	L	Exclusion
Phillips et al26	x	x	x	x	x	/	x	/	x	x	M
Waterworth and Gott27	x	x	x	x	x	/	x	x	/	x	M
Ahmedov et al28	x	x	x	x	x	x	x	x	x	x	H
Barnes et al29	x	x	x	x	x	/	x	x	x	x	H
Boyd et al20	x	x	x	x	/	/	x	/	/	/	L	Exclusion
Browne et al45	x	x	x	x	x	?	x	x	x	x	H
Close et al30	x	x	x	x	x	/	x	x	x	x	H
Glogowska et al31	x	x	x	x	x	x	x	x	x	x	H
Hancock et al6	x	x	x	x	x	x	x	x	x	x	H
Hanratty et al32	x	x	x	x	x	x	/	x	x	x	H
Hayes et al33	x	x	x	x	x	x	x	x	x	x	H
Heckman et al34	x	x	x	x	x	x	x	x	x	x	H
Kavalieratos et al35	x	x	x	x	x	/	x	x	x	x	H
MacKenzie et al21	x	x	/	/	/	/	/	/	/	x	L	Exclusion
Newhouse et al17	x	x	x	x	/	?	x	x	x	x	M
Simmonds et al36	x	x	x	x	x	x	x	x	x	x	H
Tait et al37	x	x	x	x	x	x	x	x	x	x	H
Toal et al22	x	x	x	x	/	/	/	/	/	x	L	Exclusion

*Questions that were given more weight by the reviewers: number 5 ‘Was the data collected in a way that addressed the research issue?’; number 8 ‘Was the data analysis sufficiently rigorous?’; and number 9 ‘Is there a clear statement of findings?’.

x=yes; /=no; ?=cannot tell.

H, high; L, low; M, moderate.