Table 2 Baseline characteristics of the patients with RCC
Variable | Late recurrence group (189 Patients) | Non-recurrence group (2767 Patients) | P-value |
|---|---|---|---|
Operation type |  |  |  < 0.001 |
 Radical nephrectomy | 155 (82.0%) | 1336 (48.3%) |  |
 Partial nephrectomy | 34 (18.0%) | 1431 (51.7%) |  |
Operative method |  |  |  < 0.001 |
 Laparoscopic | 29 (15.3%) | 1051 (38.0%) |  |
 HALS | 6 (3.2%) | 78 (2.8%) |  |
 Open | 142 (75.1%) | 1221 (44.1%) |  |
 Robotic | 12 (6.3%) | 417 (15.1%) |  |
Pathological tumor stage |  |  |  < 0.001 |
 1a | 52 (27.5%) | 1811 (65.4%) |  |
 1b | 49 (25.9%) | 579 (20.9%) |  |
 2a | 38 (20.1%) | 131 (4.7%) |  |
 2b | 7 (3.7%) | 48 (1.7%) |  |
 3a | 34 (18.0%) | 167 (6.0%) |  |
 3b | 7 (3.7%) | 20 (0.7%) |  |
 3c | 0 (0.0%) | 2 (0.1%) |  |
 4 | 2 (1.1%) | 9 (0.3%) |  |
Pathological node stage | Â | Â | 0.005 |
 Nx | 67 (35.4%) | 1585 (57.3%) |  |
 N0 | 115 (60.8%) | 1169 (42.2%) |  |
 N1 | 7 (3.7%) | 13 (0.5%) |  |
Histologic type | Â | Â | 0.002 |
 Clear cell | 172 (91.0%) | 2345 (84.7%) |  |
 Papillary | 5 (2.6%) | 41 (1.5%) |  |
 Chromophobe | 4 (2.1%) | 222 (8.0%) |  |
 Collecting duct | 0 (0.0%) | 3 (0.1%) |  |
 Etc | 8 (4.2%) | 156 (5.6%) |  |
Lymphovascular invasion |  |  |  < 0.001 |
 No | 172 (91.0%) | 2701 (97.6%) |  |
 Yes | 17 (9.0%) | 66 (2.4%) |  |
 Tumor size (mm) | 68.2\(\pm 68.9\) | 38.8\(\pm 27\).6 |  < 0.001 |