Trial | Method of randomisation | Allocation concealment | Blinding of intervention | Complete follow up | Blinding of assessment |
---|---|---|---|---|---|
Drew20 | Alternate | No | No | No | No |
Laing21 | Alternate | No | No | No | No |
Macdonald22 | Sealed envelope | Yes | No | No | No |
Pereira23 | Can’t tell | Can’t tell | No | Can’t tell | No |
Roy24 | Can’t tell | Can’t tell | No | No | No |
Van Caillie25 | Alternate | No | No | Yes | No |
Wells26 | Alternate | No | No | No | No |
Whitfield27 | Alternate months | No | No | No | No |