Table 2 A summary of the risk of bias assessment of the included studies
Study | Sequence generation | Allocation concealment | Blinding of participants | Blinding of outcome | Incomplete outcome data | Selective outcome reporting | Other potential threats to validity | Estimated risk of bias within study |
|---|---|---|---|---|---|---|---|---|
Anauate-Netto et al. | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Dehghani et al. | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Abdullah et al. | Low risk | High risk | Low risk | High risk | Low risk | Low risk | Low risk | High risk |
Dodwad and Kukreja | Low risk | Low risk | Low risk | High risk | Low risk | Low risk | Low risk | High risk |
Savita et al. | Low risk | Low risk | Unclear risk | Unclear risk | Unclear risk | Low risk | Low risk | Unclear risk |
Santiago et al. | High risk | High risk | High risk | High risk | Unclear risk | Low risk | High risk | High risk |
Murray et al. | Low risk | Low risk | Low risk | Unclear risk | Low risk | Low risk | Low risk | High risk |
Porwal et al. | Low risk | Low risk | Unclear risk | High risk | Low risk | Low risk | Low risk | High risk |
Krishna et al. | Low risk | Low risk | Unclear risk | High risk | Low risk | Low risk | Low risk | High risk |