Table 2 Risk of bias assessment of randomized controlled trials
Risk of bias assessment | Lian 2013 [19] | Benegas 2014 [20] | Kim 2015 [21] | Esmailiejah 2015 [22] |
|---|---|---|---|---|
Random sequence generation | Low | Low | Low | Low |
Allocation concealment | Unclear | Low | Unclear | Unclear |
Blinding of participants and personnel | High | High | High | High |
Blinding of outcome assessment | Unclear | Low | Low | Unclear |
Incomplete outcome data addressed | Low | Low | Low | Low |
Selective reporting | Low | Low | Low | Low |
Other bias | Unclear | Unclear | Unclear | Unclear |