Table 2.
The risk of bias table in this meta-analysis
| Adamson [16] | Liu [18] | McGirt [27] | Silvers [21] | Stieber [22] | Trahan [24] | Wohns [25] | |
|---|---|---|---|---|---|---|---|
| Random sequence generation | Not | Low | Low | Low | Low | High | Low |
| Allocation concealment | Low | Low | Low | Low | Not | Low | High |
| Blinding of participants and personnel | High | High | High | High | High | High | High |
| Blinding of outcome assessment | Low | High | Low | High | Low | Low | Low |
| Incomplete outcome data | Low | Low | Not | Low | Low | Low | Low |
| Selective reporting | Low | Low | Low | Low | Low | Not | Low |
| Other bias | Not | Low | Not | Not | Not | Low | Low |