Table 1.
Baseline patient characteristics.
| Characteristic | Number of Patients (%) | P value | |
|---|---|---|---|
| Training Set (n = 129) | Validation Set (n = 56) | ||
| Sex | |||
| Men | 109 (84.5) | 44 (78.5) | 0.398 a |
| Women | 20 (15.5) | 12 (21.4) | |
| Age (years) | |||
| <65 | 48 (37.2) | 20 (35.7) | 0.870 a |
| ≥65 | 81 (62.8) | 36 (64.3) | |
| MRI-determined tumor size (cm) | |||
| <3 | 82 (63.6) | 37 (66.1) | 0.868 a |
| ≥3 | 47 (36.4) | 19 (33.9) | |
| MRI-determined number of tumors | |||
| Single | 89 (69.0) | 38 (67.9) | 0.865 a |
| Multiple | 40 (31.0) | 18 (32.1) | |
| VI-RADS score | |||
| 1 | 18 (14.0) | 7 (12.3) | 0.499 b |
| 2 | 36 (27.9) | 12 (21.1) | |
| 3 | 33 (25.6) | 19 (33.3) | |
| 4 | 20 (15.5) | 6 (10.5) | |
| 5 | 22 (17.1) | 12 (21.1) | |
| Pathologic tumor (pT) stage | |||
| <pT2 | 85 (65.9) | 38 (66.7) | 0.866 a |
| ≥pT2 | 44 (34.1) | 18 (31.6) | |
MRI, magnetic resonance imaging; VI-RADS, Vesical Imaging-Reporting and Data System.
a
Statistical analysis performed using chi-square test.
b
Statistical analysis performed using Mann-Whitney U test.