Study |
Year of publication |
Random sequence generation |
Allocation concealment |
Blinding of participant’s and personnel |
Blinding of outcomes assessment |
Incomplete outcome data |
Selective reporting |
Other bias |
---|---|---|---|---|---|---|---|---|
Hunziker et al. [1] | 2012 | - | + | + | + | + | ? | + |
Sun et al. [2] | 2012 | - | + | + | + | + | + | + |
Xiao et al. [6] | 2016 | ? | + | + | + | + | + | ? |
Kim et al. [7] | 2014 | + | ? | ? | + | + | + | + |
Mantripragada et al. [9] | 2016 | + | ? | + | + | + | + | ? |
Lee et al. [12] | 2014 | ? | ? | + | + | + | ? | ? |
Bouyer et al. [14] | 2016 | + | ? | ? | + | + | + | + |
Jiang et al. [15] | 2013 | + | ? | ? | + | + | + | + |
+ = low risk; ? = unclear risk; - = high risk. |