Table 4.
Summary of Cochrane risk of bias
| Study ID | Randomization | Allocation concealment | Blinding | Incomplete data | Outcome definition |
| Grover13 | Low | Low | Low | Low | Low |
| Stone6 | Unclear | Unclear | Low | Low | Low |
| LeBlanc5 | Unclear | Unclear | Unclear | Low | Low |
| Mandal14 | Low | Low | Unclear | Low | Low |
| LoCurto15 | High | Unclear | High | Low | Low |
| Brunner20 | High | Unclear | Unclear | Low | Low |
| Cant16 | Unclear | Unclear | Low | Low | Low |
| Nichols19 | Low | Unclear | Low | Low | Low |
| Gonzalez17 | Low | Unclear | Low | Low | Low |
| Maxwell7 | Unclear | Low | Low | Low | Low |
| Villegas Carlos18 | Unclear | Unclear | Low | Low | Low |
| Heydari12 | Unclear | Unclear | Unclear | Low | Low |