Table 1 Baseline data of the included studies
First author | Publication year | Countries | Study design | Newcastle–Ottawa Scale |
|---|---|---|---|---|
1/Chen [11] | 2018 | China | Retrospective | 8 |
2/Cui [12] | 2016 | China | Retrospective | 6 |
3/Fu [13] | 2014 | China | Retrospective | 6 |
4/Fu Y [14] | 2015 | China | Retrospective | 7 |
5/Li D [15] | 2021 | China | Retrospective | 7 |
6/Li H [16] | 2021 | China | Retrospective | 7 |
7/Li J [17] | 2018 | China | Retrospective | 7 |
8/Liu [18] | 2021 | China | Retrospective | 7 |
9/Lv [19] | 2021 | China | Retrospective | 8 |
10/Qi [20] | 2017 | China | Retrospective | 7 |
11/Wang [21] | 2015 | China | Retrospective | 7 |
12/Xia [22] | 2022 | China | Retrospective | 8 |