Table 3.
Quality assessment of studies included in the final analysis according to the Newcastle-Ottawa scale (NOS).
| Study, year | Selection | Comparability | Exposure/outcome | Total | Overall quality |
|---|---|---|---|---|---|
| Baek, 2013 (23) | 3 | 1 | 3 | 7 | High |
| Chen, 2014 (22) | 3 | 2 | 2 | 7 | High |
| Maeda, 2015 (16) | 3 | 1 | 3 | 7 | High |
| Zhang, 2018 (24) | 3 | 1 | 3 | 7 | High |
| Luo, 2020 (21) | 3 | 1 | 3 | 7 | High |
| Zhang, 2021 (20) | 4 | 2 | 2 | 8 | High |
| Jiang, 2021 (18) | 4 | 1 | 3 | 8 | High |
| Ban, 2022 (12) | 4 | 2 | 3 | 9 | High |
| Hashida, 2022 (17) | 4 | 2 | 2 | 8 | High |
| Jin, 2022 (19) | 4 | 2 | 3 | 9 | High |
| Yang, 2022 (25) | 4 | 2 | 3 | 9 | High |
| Lin, 2022 (11) | 4 | 2 | 2 | 8 | High |