Table 5.
Risk of bias assessed using SYRCLE risk of bias assessment tool.
| Author | Year | Selection bias |
Performance bias |
Detection bias |
Attrition bias |
Reporting bias |
Other |
||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sequence generation | Baseline characteristics | Allocation concealment | Random housing | Blinding | Random outcome assessment | Blinding | Incomplete outcome data | Selective outcome reporting | Other sources of bias | ||
| Chen [41] | 2019 | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Furuta [42] | 2016 | Unclear Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Guo [43] | 2016 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Jia [44] | 2020 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Kuang [45] | 2019 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Li [46] | 2017 | Low Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Li [47] | 2018 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Li [48] | 2019 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Li [49] | 2020 | Unclear Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Liang [50] | 2019 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Liao [51] | 2019 | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Liu [52] | 2017 | Low Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk | Low Risk | Low Risk |
| Liu [53] | 2020 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Qi [54] | 2016 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Takeuchi [55] | 2019 | Low Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Xu [56] | 2019 | Low Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Xu [57] | 2020 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Yang [58] | 2020 | Low Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Zhang [59] | 2016 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Zhang [60] | 2019 | Unclear Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Zhang [61] | 2020 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Zhou [62] | 2019 | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |
| Zuo [63] | 2019 | Low Risk | Low Risk | Unclear Risk | Unclear Risk | Unclear Risk | Low Risk | Unclear Risk | Low Risk | Low Risk | Low Risk |