Table 2.
Results of risk of bias evaluation
| Study | Randomization process | Deviations from intended interventions | Missing outcome data | Measurement of the outcome | Selection of the reported result | Overall bias |
|---|---|---|---|---|---|---|
| Al-Zahrani et al. 2009 | Low | Some concerns | Low | Low | Low | Some concerns |
| Al-Zawawi et al. | Low | Low | Low | Low | Low | Low |
| Barbosa et al. 2018 | Low | Low | Low | Low | Low | Low |
| Elsadek et al. 2020 | Some concerns | Some concerns | Low | Low | Low | Some concerns |
| Macedo et al. 2013 | Low | Low | Low | Low | Low | Low |
| Mirza et al. 2019 | Low | Low | Low | Low | Low | Low |
| Kocak et al. 2016 | Low | Low | Low | Low | Low | Low |
| Chandra et al. 2019 | Low | Some concerns | Low | Low | Low | Some concerns |
| Dengizek Eltas et al. 2019 | Low | Low | Low | Low | Low | Low |
| Soi et al. 2021 | Some concerns | Some concerns | Low | Low | Low | Some concerns |
| Claudio et al. 2021 | Low | Some concerns | Low | Low | Low | Some concerns |