Table 1.
Basic information and quality evaluation of previous research.
| Author | Year | Type | Recurrent group | Non-recurrent group | NOS | |||
|---|---|---|---|---|---|---|---|---|
| Selection | Comparability | Outcome | Scores | |||||
| Chen | 2020 | Case-control study | 986 | 81 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Hui | 2020 | Case-control study | 81 | 17 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Xiao | 2020 | Case-control study | 40 | 29 | ☆☆☆ | ☆☆ | ☆☆ | 7☆ |
| Zheng | 2020 | Cohort study | 27 | 258 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Du | 2020 | Case-control study | 3 | 123 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Yuan | 2020 | Cohort study | 20 | 162 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Hu | 2020 | Case-control study | 11 | 58 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Tong | 2020 | Case-control study | 42 | 58 | ☆☆☆ | ☆☆ | ☆☆ | 7☆ |
| Zhou | 2020 | Case-control study | 6 | 27 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Zhao | 2020 | Case-control study | 7 | 7 | ☆☆ | ☆☆ | ☆☆ | 6☆ |
| Li | 2020 | Case-control study | 11 | 9 | ☆☆☆ | ☆☆ | ☆☆ | 7☆ |
| An | 2020 | Case-control study | 38 | 204 | ☆☆☆ | ☆☆ | ☆☆ | 7☆ |
| Huang | 2020 | Case-control study | 69 | 345 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Chen | 2021 | Cohort study | 29 | 80 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Ao | 2021 | Cohort study | 25 | 26 | ☆☆ | ☆☆ | ☆☆ | 6☆ |
| Zhao | 2021 | Case-control study | 241 | 170 | ☆☆ | ☆☆ | ☆☆☆ | 7☆ |
| Adrielle | 2021 | Case-control study | 33 | 62 | ☆☆☆ | ☆☆ | ☆☆ | 7☆ |
| Hu | 2020 | Case-control study | 30 | 158 | ☆☆ | ☆☆ | ☆☆ | 6☆ |
| Chen | 2020 | Cohort study | 189 | 1093 | ☆☆☆ | ☆☆ | ☆☆☆ | 8☆ |
| Jiang | 2021 | Case-control study | 15 | 28 | ☆☆ | ☆☆ | ☆☆ | 6☆ |
| Liu | 2020 | Case-control study | 11 | 139 | ☆☆☆ | ☆ | ☆☆☆ | 7☆ |
| Wong | 2020 | Case-control study | 21 | 85 | ☆☆ | ☆☆ | ☆☆ | 6☆ |