Table 2.

Areas of methodological quality recommended to be assessed in reviews by Cochrane Review Groups. Values are numbers (percentages)

Area of quality recommended	All (n = 50)	Components (n = 41)	Scales (n = 9)
Sequence generation	35 (70)	26 (63)	9 (100)
Concealment of allocation	43 (86)	41 (100)	2 (22)
Blinding of patients	42 (84)	33 (80)	9 (100)
Blinding of caregivers	33 (66)	32 (78)	1 (11)
Blinding of outcome assessors	48 (96)	39 (95)	9 (100)
Follow-up	47 (94)	38 (93)	9 (100)
Intention-to-treat analysis	21 (42)	20 (49)	1 (11)