Table 2.
Risk of Bias Assessment
| Author, year | Bias | ||||||
|---|---|---|---|---|---|---|---|
| Random sequence generation (selection bias) | Allocation concealment (selection bias) | Blinding of participants and personnel (performance bias) | Blinding of outcome assessment (detection bias) | Incomplete outcome data (attrition bias) | Selective reporting (reporting bias) | Other bias | |
| Boroujeni et al. 201533 | Low risk | Unclear | Unclear | Unclear | High risk | High risk | High risk |
| John et al. 200734 | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Unclear |
| Kiran et al. 201435 | High risk | High risk | High risk | High risk | High risk | Low risk | High risk |
| Kisan et al. 201436 | Unclear | Unclear | High risk | High risk | High risk | Low risk | High risk |
| Latha and Kallappan 199237 | High risk | High risk | Unclear | Unclear | Unclear | Unclear | High risk |
| Sethi et al. 198132 | Unclear | Unclear | Unclear | Unclear | High risk | Low risk | High risk |