Table 3 Methodological quality assessment (risk of bias) of included studies by Jadad scale
Study/year | Randomization (0 to 2 point(s)) | Blinding (0 to 2 point(s)) | Withdrawals and dropouts (0 to 1 point) | Total score (0 to 5 point(s)) | |||||
|---|---|---|---|---|---|---|---|---|---|
No randomization or inappropriate randomization (0 point) | Described as randomized (1 point) | Method of randomization was described and appropriate (2 point) | No blind or inappropriate method of blinding (0 point) | Described as double blind (1 point) | Method of double blinding was described and appropriate (2 point) | Did not describe the follow-up (0 point) | A description of withdrawals and dropouts (1 point) | ||
Novak V et al.[17]/2009 | - | - | ** | - | - | ** | - | * | 5 |
Kruger PS et al.[18]/2011 | - | - | ** | - | - | ** | - | * | 5 |
Patel JM et al.[19]/2012 | - | - | ** | - | * | - | - | * | 4 |
Kruger P et al.[20]/2013 | - | - | ** | - | * | - | - | * | 4 |
Papazian L et al.[21]/2013 | - | - | ** | - | - | ** | - | * | 5 |