Table 2

Results of the Assessing the Methodological Quality of Systematic Reviews 2 (AMSTAR 2) quality assessment

Reference	AMSTAR items
Reference	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	Score
Christensen et al 4	Yes	No	Yes	Yes	Yes	Cannot answer	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	75% moderate
Conger et al 5	Yes	No	Yes	Yes	Cannot answer	Cannot answer	No	Yes	No	No	Yes	Not applicable	Not applicable	Yes	Yes	Yes	50% moderate
Doherty and Smith6	Yes	No	Yes	Yes	Cannot answer	Cannot answer	No	Yes	No	No	Yes	Not applicable	Not applicable	Yes	Yes	No	44% moderate
Gonçalves Ribeiro et al 8	Yes	No	Yes	No	Yes	Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes	No	No	63% moderate
Grgic9	Yes	No	Yes	Yes	No	No	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	69% moderate
Grgic and Pickering10	Yes	No	Yes	Yes	Yes	No	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	75% moderate
Grgic et al 11	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	88% high
Polito et al 12	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	81% high
Shen et al 13	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	81% high
Southward et al 14	Yes	No	Yes	Yes	Cannot answer	Cannot answer	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	69% moderate
Warren et al 15	Yes	No	Yes	Yes	Cannot answer	Cannot answer	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	75% moderate