Table 3. Cochrane Collaboration’s Tool for Assessing Risk of Bias for Each of 5 Studies Included in the Qualitative Analysis.
| Source | Selection Bias: Random Sequence Generation | Selection Bias: Allocation Concealment | Reporting Bias: Selective Reporting | Other Bias: Other Sources of Bias | Performance Bias: Masking (Participants and Personnel) | Detection Bias: Masking (Outcome Assessment) | Attrition Bias: Incomplete Outcome Data |
|---|---|---|---|---|---|---|---|
| Beikaei et al,17 2015 | Low | Low | Low | Low | Low | Low | Low |
| Eftekharian and Rajabzadeh,18 2016 | Low | Unclear | Low | Low | Low | Low | Low |
| Ghavimi et al,19 2017 | Low | Low | Low | Low | Low | Low | Low |
| Mehdizadeh et al,20 2018 | Low | Low | Low | Low | Low | Low | Low |
| Sakallioğlu et al,21 2015 | Low | Unclear | Low | Low | High | High | Low |