Table 3.
Risk of bias assessment of the randomized controlled trial was assessed by the Cochrane collaboration tool.
| Study (year) | Randomization | Allocation concealment | Blinding of participants | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
|---|---|---|---|---|---|---|---|
| Maini et al.7 (2018) | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk |
| Maini et al.8 (2018) | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk |
| Huang et al.9 (2020) | Low risk | Low risk | Unclear | Unclear | Low risk | Low risk | Low risk |
| Wan et al.10 (2019) | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk |
| Zhang et al.15 (2020) | Low risk | Low risk | Unclear | Unclear | Low risk | Low risk | Low risk |