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)

Lundh and Gøtzsche BMC Medical Research Methodology 2008 8:22   doi:10.1186/1471-2288-8-22