Table 1.
Demographic characteristics of patients with RCC.
| Variable | All | Metastasis-free group | Metastatic group |
|---|---|---|---|
| Number, n (%) | 69 | 58 (84.1%) | 11 (15.9%) |
| Age (y) | 57.5 ± 11.1 | 57.1 ± 11.6 | 59.7 ± 7.8 |
| Gender | |||
| Male, n (%) | 47 (68.1%) | 40 (68.9%) | 7 (63.6%) |
| Female, n (%) | 22 (31.9%) | 18 (31.1%) | 4 (36.4%) |
| Pathological type, n (%) | |||
| Clear-cell carcinoma | 59 (85.5%) | 50 (86.2%) | 9 (81.8%) |
| Papillary carcinoma | 5 (7.2%) | 4 (6.9%) | 1 (9.1%) |
| Chromophobe carcinoma | 4 (5.8%) | 3 (5.2%) | 1 (9.1%) |
| Eosinophilic tumor | 1 (1.5%) | 1 (1.7%) | 0 (0%) |
| Pathological grading | |||
| I | 8 (11.6%) | 7 (12.1%) | 1 (9.1%) |
| I-II | 3 (4.3%) | 3 (5.2%) | 0 (0%) |
| II | 49 (71.1%) | 40 (69.0%) | 9 (81.8%) |
| II-III | 6 (8.7%) | 6 (10.3%) | 0 (0%) |
| III | 3 (4.3%) | 2 (3.4%) | 1 (9.1%) |
| TNM staging | |||
| T1 | 41 (59.4%) | 38 (65.5%) | 3 (27.3%) a,b |
| T2 | 25 (36.2%) | 18 (31.1%) | 7 (63.6%) a,b |
| T3 | 2 (2.9%) | 1 (1.7%) | 1 (9.1%) |
| T4 | 1 (1.5%) | 1 (1.7%) | 0 (0%) |
| N0 | 68 (98.5) | 58 (100%) | 10 (90.9%) |
| N1 | 1 (1.5%) | 0 (0%) | 1 (9.1%) |
| M0 | 69 (100%) | 58 (100%) | 11 (100%) |
| M1 | 0 (0%) | 0 (0%) | 0 (0%) |
| Surgical treatments | |||
| Radical nephrectomy | 26 (37.7%) | 17 (29.3%) | 9 (81.8%) a,b |
| Partial nephrectomy | 43 (62.3%) | 41 (70.7%) | 2 (18.2%) a,b |
Data presented as mean ± SD or n (%) and P < 0.05 was considered statistically significant.
a P < 0.05 vs. All; b P < 0.05 vs. Metastasis-free group.