Table 3.
Risk of bias regarding outcomes of the studies included in the systematic review
| Random sequence generation | Allocation concealment | Blinding: participants, personnel | Blinding: outcomes | Incomplete outcome assessment | Selective reporting | Other | Global risk | |
|---|---|---|---|---|---|---|---|---|
| Bladh 42 | Unclear | Low | High | Unclear | Low | High | High risk of bias | |
| Bolas 43 | Low | Low | High | High | High | High | Low | High risk of bias |
| Farris 17 | Low | Low | High | Low | Low | Low | Low | Low risk of bias |
| Frankenthal 44 | Low | Low | High | Low | Low | Low | Unclear | Unclear risk of bias |
| Gillepsie 28 | Low | Low | High | Low | Low | Low | High | High risk of bias |
| Jarab 33 | Low | Low | High | Low | Low | Low | Unclear | Unclear risk of bias |
| Koehler 29 | Low | Low | High | Low | Low | Unclear | High | High risk of bias |
| Lipton 26 | Low | High | High | Low | Low | Low | High | High risk of bias |
| Lisby 20 | Low | Unclear | High | Low | Low | High | Unclear | High risk of bias |
| Lisby 21 | Unclear | Unclear | High | Unclear | Low | Low | High | High risk of bias |
| McMullin 45 | Low | Low | High | High | Low | Low | Low | High risk of bias |
| Morgado 22 | High | Unclear | High | Low | Low | Low | Unclear | High risk of bias |
| Nazareth 18 | Low | Low | High | Low | Low | Low | Low | Low risk of bias |
| Sadik 23 | Low | Unclear | High | Low | Low | Low | Unclear | Unclear risk of bias |
| Scullin 27 | Low | High | High | Low | High | Low | High | High risk of bias |
| Schnipper 19 | Low | Low | High | Low | Low | Low | Low | Low risk of bias |
| Spinewine 24 | High | Unclear | High | Low | Low | Low | High | High risk of bias |
| Stowasser 25 | Low | Unclear | High | Low | Low | Low | Low | Unclear risk of bias |
| Zhang 16 | Low | Low | High | Low | Low | High | Unclear | High risk of bias |