Table 2.

Methodological quality of systematic reviews based on AMSTAR (Assessment of Multiple Systematic Reviews) scores.

Author	Q1a	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9	Q10	Q11	Total
Chaudhry et al [20]	No	Yes	Yes	No	No	Yes	Yes	No	No	No	No	4
Ciere et al [14]	No	Yes	Yes	CAb	No	CA	Yes	Yes	No	Yes	No	5
Clarke et al [17]	No	Yes	Yes	No	CA	No	No	No	No	No	No	2
Clark et al [21]	No	Yes	Yes	Yes	CA	Yes	No	No	Yes	No	Yes	6
Dang et al [22]	No	CA	Yes	No	Yes	Yes	Yes	Yes	No	No	Yes	6
Giamouzis et al [16]	No	Yes	Yes	No	No	Yes	No	No	No	CA	Yes	4
Hughes and Granger [23]	No	No	No	No	No	Yes	No	No	No	No	CA	1
Inglis et al [9]	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	10
Klersy et al [19]	No	No	Yes	No	Yes	Yes	No	No	Yes	No	No	4
Kotb et al [8]	No	Yes	Yes	Yes	CA	Yes	Yes	Yes	Yes	No	No	7
Maric et al [24]	No	No	No	No	No	Yes	No	No	No	No	Yes	2
Martinez et al [25]	No	No	Yes	Yes	No	Yes	Yes	Yes	CA	No	Yes	6
Nakamura et al [10]	CA	Yes	No	No	No	Yes	No	No	Yes	No	Yes	4
Pandor et al [11]	Yes	No	Yes	Yes	No	Yes	Yes	Yes	No	No	Yes	7
Polisena et al [18]	Yes	Yes	No	No	No	Yes	Yes	No	Yes	No	Yes	6
Radhakrishnan and Jacelon [15]	No	No	No	CA	No	Yes	No	No	No	No	No	1
Schmidt et al [26]	No	No	No	No	No	No	No	No	No	No	No	0
Smith [12]	No	No	Yes	No	No	No	Yes	No	No	No	No	2
Xiang et al [13]	No	Yes	No	No	No	Yes	CA	No	Yes	Yes	No	4

^aQ: question.

^bCA: can’t answer.