Table 2.
Assessment of the methodological quality of included studies.
| First author | Published year | Evaluation project | ||||
|---|---|---|---|---|---|---|
| Randomly generated | Distribution of hidden | Double-blind | Outcome integrity | Other bias | ||
| Hiroshi Takahashi | 2021 | 1 | 1 | 3 | 2 | 1 |
| Xijia Jiang | 2018 | 1 | 2 | 1 | 3 | 2 |
| Yang Qu | 2017 | 2 | 1 | 2 | 1 | 2 |
| JennyC. Kienzler | 2020 | 1 | 1 | 1 | 2 | 1 |
| Xiang Gao | 2020 | 1 | 2 | 1 | 1 | 1 |
| Yueyang Li, MS | 2021 | 1 | 2 | 1 | 1 | 2 |
| Kang Li | 2019 | 2 | 2 | 1 | 2 | 1 |
| Sherwan A. | 2020 | 1 | 1 | 1 | 1 | 2 |
| Mengxian Jia | 2021 | 1 | 2 | 1 | 2 | 3 |
Note: 1 stands for low risk, 2 represents unknown risk, and 3 is high risk.