Table 1 Main characteristics of the included studies
Study | Region | Study design | Sample | Follow-up (month) | Recruitment period | Survival endpoints | NOS | Data sources (R/C) |
|---|---|---|---|---|---|---|---|---|
Gengpeng Lin (2018) [19] | China | Retrospective | 26 | NR | 1999–2011 | OS | 7 | R |
Jian Wang (2022) [20] | China | Retrospective | 98 | Median 42 | 2013–2019 | OS, DFS | 8 | R |
Xiaoling Xu (2021) [21] | China | Retrospective | 31 | NR | 2010–2015 | OS | 6 | R |
Takuya Matsui (2021) [22] | Japan | Retrospective | 72 | Median 63.3 | 2005–2015 | OS, DFS | 7 | R |
Daisuke Ueda (2021) [23] | Japan | Retrospective | 47 | Median 55 | 1997–2018 | OS | 8 | R |
Lei Cai (2021) [24] | China | Retrospective | 51 | NR | 2010–2019 | DFS | 6 | R |
Tingting Wang (2021) [25] | China | Retrospective | 317 | Median 52.8 | 2011–2015 | OS, DFS | 8 | R |
Ho Yun Lee (2016) [26] | Korea | Retrospective | 81 | Median 33.7 | 2003–2011 | OS, DFS | 8 | R |
Tomonari Oki (2019) [27] | Japan | Retrospective | 99 | Median 55 | 2004–2017 | OS | 7 | R |
Hyun Jung Yoon (2022) [28] | Korea | Retrospective | 121 | Median 81.4 | 1998–2012 | OS, DFS | 7 | R |
Min A. Lee (2020) [29] | Korea | Retrospective | 119 | Median 89.3 | 1998–2012 | OS | 7 | R |