Table 2 Quality assessment
Study | Prognostically homogenous study population | Concealment of random allocation | Prestratification on prognostically relevant variables | Description of randomisation procedure | Registration of loss to follow-up | Registration of co-interventions for each group | Blinding of outcome assessors | Check success of blinding |
|---|---|---|---|---|---|---|---|---|
Behnke [19, 20] | +/- | - | - | - | + | +/- | - | - |
Kirsten 1998 [22] | +/- | - | - | - | + | +/- | - | - |
Man 2004 [24] | +/- | + | + | +/- | + | - | - | - |
Murphy 2005 [21] | +/- | + | - | - | + | - | - | - |
Nava 1998 [23] | +/- | - | - | +/- | + | - | - | - |
Troosters [25, 26] | +/- | + | - | - | + | - | - | - |