Table 2.

Study quality according to MMAT

Study Type		Criteria		Number of Articles
		Present	Absent	Not mentioned	Not applicable
Qualitative (n = 35)	1.1 Relevant source of data	35	0	0	0
	1.2 Relevant methods of analysis	33	0	2	0
	1.3 Context	31	3	1	0
	1.4 Reflexivity	14	18	3	0
Quantitative randomised (n = 1)	2.1 Randomisation	1	0	0	0
	2.2 Blinding	1	0	0	0
	2.3 Complete outcome data	0	1	0	0
	2.4 Dropout rate	0	1	0	0
Quantitative non-randomised (n = 16)	3.1 Selection bias minimised	15	1	0	0
	3.2 Appropriate measurements	15	0	1	0
	3.3 Comparable groups	11	0	1	4
	3.4 Complete outcome data/acceptable response rate	7	3	6	0
Quantitative descriptive (n = 38)	4.1 Sampling strategy	37	0	1	0
	4.2 Representativeness	24	9	5	0
	4.3 Appropriate measurements	38	0	0	0
	4.4 Acceptable response Rate	10	14	12	2
Mixed methods (n = 4)	5.1 Justification of design	4	0	0	0
	5.2 Data integration	1	0	2	1
	5.3 Limitations of integration	1	1	1	1