Table 2 Risk of bias assessment of the RCTs
Study | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
|---|---|---|---|---|---|---|---|
Basile et al. [21] | Unclear risk | Unclear risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Xia et al. [22] | Low risk | Low risk | Unclear risk | Unclear risk | Low risk | Low risk | Low risk |