Table 1.
Characteristics and Quality assessment of included studies.
| ID | First Author, Year | Country | Study Design | Selection (4 points) | Comparability (2 points) | Outcome (3 points) | Total (9 points) |
|---|---|---|---|---|---|---|---|
| 1 | Guan W, 2020 | China | retrospective | 3 | 2 | 3 | 8 |
| 2 | Huang Y, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 3 | Tang N, 2020 | China | retrospective | 1 | 2 | 2 | 5 |
| 4 | Cai s, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 5 | Chen L, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 6 | Feng K, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 7 | Liu W, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 8 | Chen C, 2020 | China | retrospective | 2 | 2 | 2 | 6 |
| 9 | Zhang L, 2020 | China | retrospective | 2 | 2 | 2 | 6 |
| 10 | Tian S, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 11 | Bernheim S, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 12 | Wu J, 2020 | China | retrospective | 2 | 2 | 2 | 6 |
| 13 | Peng YD 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 14 | Wang D 2020 | China | retrospective | 3 | 2 | 3 | 8 |
| 15 | Xu H–Y, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 16 | Xia W, 2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 17 | Yang W, 2020 | China | retrospective | 2 | 2 | 2 | 6 |
| 18 | Xiong Y,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 19 | Hu Z,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 20 | Zhang JJ,2020 | China | retrospective | 2 | 2 | 2 | 6 |
| 21 | Wang D,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 22 | Walker,2020 | Australia | retrospective | 1 | 2 | 1 | 3 |
| 23 | Liu K,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 24 | Yang X,2020 | China | retrospective | 2 | 2 | 2 | 6 |
| 25 | Wang X,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 26 | Chung M,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 27 | Li Q,2020 | China | retrospective | 3 | 2 | 3 | 8 |
| 28 | Ki M,2020 | Korea | retrospective | 2 | 2 | 3 | 7 |
| 29 | Chen N,2020 | China | retrospective | 2 | 2 | 3 | 7 |
| 30 | Fan BE,2020 | China | retrospective | 3 | 2 | 3 | 8 |
| 31 | Chang D,2020 | China | retrospective | 3 | 2 | 2 | 7 |
| 32 | Yao Y,2020 | China | retrospective | 2 | 2 | 1 | 5 |
| 33 | Cheng J,2020 | China | retrospective | 2 | 2 | 1 | 5 |
| 34 | Song F,2020 | China | retrospective | 3 | 2 | 3 | 8 |
| 35 | Zhou S,2020 | China | retrospective | 3 | 2 | 3 | 8 |
| 36 | Yueying P,2020 | China | retrospective | 4 | 1 | 2 | 7 |
| 37 | Liu C,2020 | China | Retrospectively | 3 | 2 | 2 | 7 |
| 38 | Shi H,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 39 | Zhao W,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 40 | Pan F,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 41 | Huang C,2020 | Chine | retrospectively | 3 | 2 | 2 | 7 |
| 42 | Li YY,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 43 | Yang HY,2020 | China | retrospectively | 2 | 1 | 3 | |
| 44 | Zhu ZW,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 45 | Ai T,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 46 | Ling Y,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 47 | Lan L,2020 | China | retrospectively | 3 | 2 | 2 | 7 |
| 48 | Sun,2020 | USA | retrospectively | 2 | 2 | 1 | 5 |
| 49 | Li J,2020 | China | retrospectively | 3 | 2 | 1 | 6 |
| 50 | Xu,2020 | China | retrospectively | 3 | 2 | 1 | 6 |