Table 1. Study characteristics.
| First author | Country | Published year | Mean age (year) | FIGO stage | Cases | Mean Follow-up (year) | Cut-off level (%) | Method | Survival type | HR estimation | NOS |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sundov D. [23] | Croatia | 2017 | 55 | I-VI | 81 | NA | 10 | IHC | OS | Directly obtained | 7 |
| Juan W. [24] | China | 2016 | 53 | I-VI | 257 | 3 | NA | IHC | OS /PFS | Directly obtained | 7 |
| Li X. [25] | China | 2016 | 47 | I-VI | 43 | 2.12 | 20 | IHC | OS/PFS | Directly obtained | 7 |
| Liew PL. [26] | Taiwan | 2015 | 54.3 | I-VI | 108 | 4.13 | 10 | IHC | OS/DFS | Directly obtained | 7 |
| Bodnar L. [27] | Poland | 2014 | 54 | I-VI | 61 | NA | 10 | IHC | OS/ PFS | Directly obtained | 8 |
| Taskin S. [28] | Ankara | 2012 | 58.63 | I-VI | 30 | 2.81 | 25 | IHC | OS | Directly obtained | 6 |
| Huang KJ. [18] | China | 2012 | NA | NA | 136 | 2.13 | 5 | IHC | OS | Directly obtained | 7 |
| Dian D. [19] | Germany | 2011 | 60.35 | I-VI | 100 | 13 | 25 | IHC | OS/ PFS | From curves | 7 |
| Ho CM. [29] | China | 2010 | 51 | II-VI | 58 | 2.72 | 10 | IHC | OS/PFS | Directly obtained | 6 |
| Shim HS. [30] | Kroea | 2009 | 50.2 | II-VI | 72 | NA | 25 | IHC | OS | From curves | 7 |
| Blechschmidt K. [31] | Germany | 2008 | 63 | III, IV | 48 | 4.58 | 10 | IHC | OS | Directly obtained | 8 |
| Scholten AN. [32] | Netherlands | 2006 | NA | I-VI | 225 | 11.6 | 25 | IHC | OS | Directly obtained | 7 |
| Cho EY. [33] | Korea | 2006 | NA | I-VI | 95 | 2.67 | 10 | IHC | OS | From curves | 6 |
| Voutilainen KA. [20] | Finland | 2006 | 62 | I-VI | 282 | 12 | 5 | IHC | OS /PFS | From curves | 8 |
| Faleiro-Rodrigues C. [34] | Portugal | 2004 | 56 | I-VI | 104 | 6 | 10 | IHC | OS | Directly obtained | 8 |
| Darai E. [35] | France | 1997 | 53.5 | I-III | 20 | 24 | 10 | IHC | OS | From curves | 7 |
Note: NA: Not available; HR: Hazard ratio; FIGO: International Federation of Gynecology and Obestetrics; IHC: Immunohistochemistry; OS: Overall survival; PFS: Progression-free survival; NOS:Newcastle-Ottawa quality assessment scale.