Table 2.

The Summary of Review Authors’ Judgments About Each Risk of Bias Item for Included Studies

Study	Random sequence generation	Allocation concealment	Blinding	Incomplete outcome data	Selective reporting	Other bias
Panahi et al. 2016	L	L	H	L	L	U
Rahmani et al. 2016	L	L	L	L	L	U
Navekar et al. 2017	L	H	L	L	L	U
Moradi-Kelardeh et al. 2017	L	U	H	L	L	U

H: high risk of bias; L: low risk of bias; U: unclear or unrevealed risk of bias. Criteria defined for risk of bias assessment are according to the Cochrane guidelines.