Table 1.

The modified Jadad questionnaire for assessing the risk of bias

Modified Jadad Questionnaire
1) “Was the study described as randomized?”
2) “Was the randomization protocol detailed and appropriate?”
3) “Was the study described as double-blind?”
4) “Was the blinding process detailed and appropriate?”
5) “Did the study have a control group?”
6) “Was the control detailed and appropriate?”
7) “Was there an adequate exclusion criterion?”
8) “Was the intervention used at a therapeutic dose?”
9) “Was there a description of withdrawals and dropouts?”
10) “Were the data clearly and adequately reported?”
Yes. 1 point; No. 0 point; (total score of 10)