Table 2. Quality of the Cochrane and non-Cochrane Reviews according to AMSTAR and r-AMSTAR.

		Cochrane		Non-Cochrane
		AMSTAR	r-AMSTAR	AMSTAR	r-AMSTAR
Grade*	A	12 (40%)	14 (46.7%)	0 (0%)	0 (0%)
	B	12 (40%)	13 (43.3%)	2 (6.7%)	3 (10%)
	C	4 (13.3%)	3 (10%)	1 (3.3%)	8 (26.7%)
	D	0 (0%)	0 (0%)	2 (6.7%)	8 (26.7%)
	E	2 (6.7%)	0 (0%)	5 (16.7%)	6 (20%)
	F	0 (0%)	0 (0%)	20 (66.7%)	5 (16.7%)

A; 90%, B; 80%, C; 70%, D; 60%, E; 50%, F; <50%.