Table 4.
Tabular Presentation of Risk of Bias of Included SRs/MAs
| Review | Phase 2 | Phase 3 | |||
|---|---|---|---|---|---|
| 1. Study Eligibility Criteria | 2. Identification and Selection of Studies | 3. Data Collection and Study Appraisal | 4.Synthesis and Findings | Risk of Bias in the Review | |
| Chai (2009)37 |  |
 |
 |
 |
 |
| Cao (2012)38 |  |
 |
 |
 |
 |
| Lu (2012)39 |  |
 |
 |
 |
 |
| Lu (2015)40 |  |
 |
 |
 |
 |
| Lin (2016)41 |  |
 |
 |
 |
 |
| Zhao (2016)42 |  |
 |
 |
 |
 |
| Hu (2016)43 |  |
 |
 |
 |
 |
| Guo (2018)44 |  |
 |
 |
 |
 |
| Cao (2019)45 |  |
 |
 |
 |
 |
| Kong (2019)46 |  |
 |
 |
 |
 |
| Zheng (2020)47 |  |
 |
 |
 |
 |
| Wang (2020)48 |  |
 |
 |
 |
 |
| Fan (2020)49 |  |
 |
 |
 |
 |
| Yang (2021)50 |  |
 |
 |
 |
 |
Abbreviations: 
, low risk of bias; 
, high risk of bias; ?, unclear.