Table 3.
Summary of the risk of bias for each study according to Revised Cochrane Risk of Bias Tool for Randomized Trials (RoB 2).
| Study | Risk of bias due to | Overall risk of bias | ||||
|---|---|---|---|---|---|---|
| The randomization process | Deviations from the intended interventions | Missing outcome data | Measurements of the outcomes | Selection of the reported results | ||
| Elkind-Hirsch et al. [26] | Some concerns | Some concerns | Low risk | Low risk | Low risk | Some concerns |
| Jensterle Sever et al. [27] | Some concerns | Some concerns | Low risk | Low risk | Low risk | Some concerns |
| Jensterle et al. [28] | Some concerns | Some concerns | Low risk | Low risk | Low risk | Some concerns |
| Jensterle et al. [29] | Some concerns | Some concerns | Some concerns | Low risk | Some concerns | Some concerns |
| Liu et al. [30] | Some concerns | Some concerns | Some concerns | Low risk | Some concerns | Some concerns |
| Salamun et al. [31] | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |