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Clinical and pathological features of the study population (n=622).
| Feature | Total n, (%) |
|---|---|
| Fuhrman grade | |
| 1 | 170 (27.3) |
| 2 | 345 (55.5) |
| 3 | 107 (17.2) |
| Tumor grade | |
| 1 | 334 (53.7) |
| 2 | 49 (7.9) |
| 3 | 217 (34.9) |
| 4 | 22 (3.5) |
| Local lymph node metastasis | |
| No | 588 (94.5) |
| Yes | 34 (5.5) |
| Distant metastasis | |
| No | 521 (83.8) |
| Yes | 101 (16.2) |
| Sex | |
| Female | 249 (40.0) |
| Male | 373 (60.0) |
| Age at surgery, years | |
| ≤65 | 353 (56.8) |
| >65 | 269 (43.2) |
| ECOG | |
| 0 | 381 (61.3) |
| >0 | 241 (38.7) |
ECOG, Eastern Cooperative Oncology Group.
