Trial | Sequence generation | Allocation concealment | Blinding of assessors | Lower or high risk of bias |
---|---|---|---|---|
Atteya et al. [41] | Inadequate | Unclear | Adequate | Highb |
Dahl et al. [48] | Adequate | Unclear | Adequate | High |
Dromerick et al. [52] | Adequate | Unclear | Adequate | High |
Dromerick et al. [42] | Inadequate | Unclear | Adequate | High |
Hammer and Lindmark [53] | Adequate | Unclear | Inadequate | High |
Lin et al. [47] | Adequate | Adequate | Adequate | Lowera |
Lin et al. [46] | Adequate | Adequate | Adequate | Lower |
Myint et al. [45] | Adequate | Adequate | Adequate | Lower |
Page et al. [43] | Inadequate | Unclear | Adequate | High |
Page et al. [55] | Adequate | Unclear | Adequate | High |
Page et al. [54] | Adequate | Unclear | Adequate | High |
Ploughman and Corbett [49] | Adequate | Unclear | Adequate | High |
Wu et al. [44] | Inadequate | Unclear | Adequate | High |
Wu et al. [50] | Adequate | Unclear | Adequate | High |