Table 2 The quality assessment of the included RCTs
Researcher | Year | Sequence generation | Allocation concealment | Blinding | Lost and withdrawal | Jadad |
|---|---|---|---|---|---|---|
Wu F | 2018 | Sufficient (2) | Unclear (1) | Not mentioned (1) | No (0) | 4 |
Song WC | 2018 | Insufficient (0) | Insufficient (0) | Not mentioned (1) | Yes (1) | 2 |
Wang ZF | 2018 | Unclear (1) | Unclear (1) | Not mentioned (1) | No (0) | 3 |
Chen Q | 2014 | Unclear (1) | Unclear (1) | Not mentioned (1) | Yes (1) | 4 |
Wang QZ | 2019 | Unclear (1) | Unclear (1) | Not mentioned (1) | No (0) | 3 |
Zhang YY | 2014 | Unclear (1) | Unclear (1) | Not mentioned (1) | Yes (1) | 4 |