Table 1.
Overall patient demographics and preoperative characteristics.
| No 3D | 3D | P value | |
|---|---|---|---|
| No. of patients | 177 | 147 | |
| Malesa | 114 (64.4) | 88 (59.9) | 0.401 |
| Ageb (yr) | 58.1 (11.7) | 58.6 (12.0) | 0.654 |
| BMIc (kg/m2) | 25.7, 25.0 (23.5; 27.5) | 25.1, 25.1 (23.2; 26.7) | 0.227 |
| ECOGc | 0.21, 0 (0; 0) | 0.24, 0 (0; 0) | 0.889 |
| ASA scorec | 1.39, 1 (1; 2) | 1.29, 1 (1; 2) | 0.095 |
| Preoperative hemoglobinc (g/L) | 141.7, 143.0 (130.0; 156.0) | 139.7, 141.0 (129.0; 151.0) | 0.281 |
| Tumor size at CT scanc (mm) | 34.4, 32.0 (26.0; 41.0) | 35.5, 33.0 (25.0; 43.0) | 0.908 |
| Clinical stagea | 0.319 | ||
| cT1a | 130 (73.4) | 104 (70.7) | |
| cT1b | 43 (24.3) | 35 (23.8) | |
| ≥cT2 | 4 (2.3) | 8 (5.4) | |
| R.E.N.A.L. scorec | 7.57, 8.0 (6.0; 9.0) | 7.29, 7.0 (6.0; 8.0) | 0.069 |
| PADUA scorec | 8.5, 8.0 (7.0; 9.0) | 8.5, 8.0 (7.0; 10.0) | 0.733 |
| Tumor location (up/low)a | 0.480 | ||
| Upper pole | 72 (40.7) | 62 (42.2) | |
| Mediorenal | 49 (27.7) | 47 (32.0) | |
| Lower pole | 56 (31.6) | 38 (25.9) | |
| Tumor location (anterior/posterior)a | 0.549 | ||
| Anterior | 89 (50.3) | 69 (46.9) | |
| Posterior | 88 (49.7) | 78 (53.1) | |
| Tumor location (rim)a | 0.573 | ||
| Medial rim | 68 (38.4) | 61 (41.5) | |
| Lateral rim | 109 (61.6) | 86 (58.5) |
ASA = American Society of Anesthesiologists; BMI = body mass index; CT = computed tomography; ECOG = Eastern Cooperative Oncology Group; IQR = interquartile range, a = no. (%); b = mean (standard deviation); c = mean, median (interquartile range).