|
| Risk of bias | Indiectedness | Inconsistency | Imprecision | Publication bias |
| [8] | Unclear risk of performance bias in blinding | Low risk of bias | Low risk bias | Unclear risk of imprecision | Low risk bias |
| [10] | Unclear risk of performance bias in randomization | Low risk of bias | Low risk of bias | Unclear risk of imprecision | Low risk of bias |
| [11] | Unclear risk of performance bias in blinding | Low risk of bias | Low risk of bias | Unclear risk of imprecision | Low risk of bias |
| [12] | Low risk of bias | Low risk of bias | Low risk of bias | Risk of imprecision | Low risk of bias |
| [13] | Unclear risk of performance bias in blinding | Low risk of bias | Low risk of bias | Risk of imprecision | Low risk of bias |