Table 3.

Risk of bias assessment by the version 2 of Cochrane tool for assessing risk of bias in randomized trials (RoB 2).

	Study ID	Bias arising from the randomization process	Bias due to deviations from intended interventions	Bias due to missing outcome data	Bia in measurement of the outcome	Bias in selection of the reported result	Overall assessment
1	Tehranchi 2018 [19]	Low risk	Some concerns	Low risk	Low risk	Some concerns	Some concerns
2	El-Timamy 2020 [20]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
3	Pacheco 2020 [21]	Low risk	Low risk	Low risk	Some concerns	Some concerns	Some concerns
4	Çağlı Karcı 2021 [22]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
5	Erdur 2021 [23]	Low risk	Low risk	Low risk	Some concerns	Low risk	Some concerns
6	Karakasli 2021 [24]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
7	Zeitounlouian 2021 [25]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
8	Joy 2021 [26]	Some concerns	Low risk	Low risk	Low risk	Low risk	Some concerns
9	Angel 2022 [27]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk