Table 5.
Study | Selection Bias | Performance Bias | Detection Bias | Attrition Bias | Reporting Bias | Quality | |
---|---|---|---|---|---|---|---|
Random Sequence Generation | Allocation Concealment | Blinding of Participants and Personnel | Blinding of Outcome Assessment | Incomplete Outcome Data Addressed | Selective Reporting | ||
Boers et al. [13] | + | − | − | + | + | + | Good |
Fontes-Villalba et al. [16] a | + | − | − | + | + | + | Good |
Jönsson et al. [9] a | + | − | − | + | + | + | Good |
Lindeberg et al. [17] | + | − | − | + | ? | + | Good |
Masharani et al. [18] | ? | − | − | − | + | + | Fair |
a Studies conducted on the same population; + low risk; ? unclear risk; − high risk.