Table 1: The characteristic of studies- Overall Survival (OS).
| Study | Patient number | Follow-up | |||
|---|---|---|---|---|---|
| TOR | TAM | ||||
| Events | Total | Events | Total | ||
| Zhang 2010 | 121 | 121 | 115 | 115 | 2 years |
| Kimura 2014 | 122 | 126 | 123 | 126 | 5 years |
| Qin 2013 | 58 | 66 | 158 | 181 | 6 years |
| Ma 2012 | 1386 | 1552 | 1359 | 1532 | unavailable |
| unavailable | 1618 | 1890 | 1543 | 1857 | 5 years |