Table 2.
Author | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete data | Selective reporting | Other bias |
---|---|---|---|---|---|---|---|
Zhu et al. [21] | High risk | High risk | Low risk | Uncertain | Low risk | Low risk | Low risk |
Qi et al. [19] | Low risk | High risk | High risk | High risk | Low risk | High risk | Low risk |
Zhou et al. [22] | Low risk | Uncertain | Low risk | High risk | Low risk | Uncertain | Uncertain |
Liu et al. [20] | High risk | High risk | Uncertain | Low risk | Low risk | Low risk | Uncertain |
Wang et al. [18] | High risk | Low risk | Low risk | High risk | Low risk | Uncertain | Low risk |
Xin et al. [23] | High risk | Uncertain | High risk | Low risk | High risk | Low risk | Low risk |
Liu et al. [24] | High risk | High risk | Uncertain | Low risk | Low risk | Low risk | Uncertain |
Zhao et al. [25] | High risk | Uncertain | Low risk | High risk | Low risk | High risk | Uncertain |
Zhou et al. [16] | Low risk | Uncertain | Uncertain | Low risk | Low risk | Low risk | Low risk |
Jiang et al. [17] | Low risk | Uncertain | Low risk | High risk | Low risk | High risk | Low risk |