Table 7 Scores for assessment of risk of bias for intervention studies
Risk of bias | Bertoglio et al. 2011 | James et al. 2009 | Adams et al. 2009 | Rossignol et al. 2007 | James et al. 2004 |
|---|---|---|---|---|---|
Randomisation | Uncertain | Open label | Uncertain | Open label | Open label |
Concealment of allocation | Low risk | Open label | Low risk | Open label | Open label |
Blinding | Low risk | Open label | Low risk | Open label | Open label |
Incomplete outcome data | High risk | Low risk | High risk | Low risk | Low risk |
Selective reporting | High risk | Low risk | High risk | Low risk | Low risk |
Overall score | 5 | 4 | 5 | 4 | 4 |