Table 2.

Risk of Bias.

Author	Cochrane Risk of Bias Criteria							Jadad score
	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other sources of bias
Baumgartner F.J.	Low	Unclear	High	High	Low	Low	Low	2
Inan K.	Unclear	Unclear	High	High	Low	Low	Low	2
Ishy A	Low	Unclear	High	High	Low	Low	Low	2
Katara A.N.	Low	Low	High	High	Low	Low	Low	3
Li X	Low	Low	High	High	Low	Low	Low	3
Licht PB	Low	Low	Low	Low	High	Low	Low	4
Liu YG	Low	Unclear	High	High	Low	Low	Low	2
Mahdy T	Low	Low	High	High	Low	Low	Low	3
Munia MA	Unclear	Unclear	High	High	Low	Low	Low	2
Yang J	Low	Unclear	High	High	Low	Low	Low	2
Yazbek G	Low	Unclear	High	High	Low	Low	Low	2

The level of bias was determined as follows: “Low” indicates a low risk of bias;”Unclear” indicates an uncertain risk of bias; and “High” indicates a high risk of bias.