Appendix B. . Risk of bias.
| Selection bias | Performance bias | Detection bias | Attrition bias | Reporting bias | Other biases | ||
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| Reference | Random sequence generation | Allocation concealment | Blinding of participants and professionals | Blinding of outcome raters | Incomplete outcomes | Selective outcome reporting | Other sources of bias |
| Mahwi et al.(21) | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Jarab et al.(26) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Wishah et al. (27) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | High risk | High risk | Unclear risk of bias |
| Chung et al.(28) | Unclear risk of bias | Potential risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Ali et al.(29) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Mourão et al.(30) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Chan et al.(31) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Korcegez et al.(32) | High risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Siaw et al.(33) | Low risk | Low risk | Low risk | Unclear risk of bias | Low risk | Low risk | Low risk |
| Cani et al.(34) | Low risk | Unclear risk of bias | High risk | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Aguiar et al.(35) | Low risk | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Low risk | Low risk |
| Chen et al.(36) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Jahangard-Rafsanjani et al.(37) | Low risk | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |
| Xin et al.(38) | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Risco de viés incerto |
| Shao et al.(39) | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Unclear risk of bias | Low risk | Low risk | Unclear risk of bias |