Table 2.
Cochrane Collaboration's tool for quality assessment in all included trials.
| Trials | Year | Sequence generation | Allocation concealment | Blinding of outcome assessors | Incomplete outcome data | Selective outcome reporting |
Others |
|---|---|---|---|---|---|---|---|
| Chen et al. | 2021 | Low | Unclear | Low | Low | Low | Low |
| Hu et al. | 2020 | Low | Low | Low | Low | Low | Low |
| Yu | 2020 | Low | Low | Unclear | Low | Low | Unclear |
| Chen et al. | 2020 | Low | Low | Low | Low | Low | Unclear |
| Xiao et al. | 2020 | Unclear | High | Unclear | Low | Low | Low |
| Fu et al. | 2020 | Low | Low | Low | Low | Low | Low |
| Fu et al. | 2020 | Low | Low | Unclear | Low | Low | Unclear |
| Xiao et al. | 2020 | Unclear | Low | Low | Low | Low | Unclear |
| Wang et al. | 2021 | Low | Low | Low | Low | Low | Unclear |
| Li and Zhang | 2020 | Low | Low | Unclear | Low | Low | Low |
| Yang et al. | 2020 | Low | Unclear | Low | Low | Low | Unclear |
| Duan et al. | 2020 | Low | Low | Low | Low | Low | Unclear |
| Ding et al. | 2020 | Low | Low | Low | Low | Low | Unclear |