Table 1. Demographics of patients undergoing partial nephrectomy for ≤4-cm lesions presumed to be RCC from preoperative imaging.
| Characteristic | Value |
|---|---|
| Type of partial nephrectomy | |
| Open | 26 (3.6) |
| Laparoscopic | 84 (11.5) |
| RAPN | 615 (84.2) |
| Laparoscopic converted to open | 1 (0.1) |
| RAPN converted to open | 4 (0.5) |
| History of diabetes | |
| No | 515 (78.7) |
| Yes | 139 (21.3) |
| Missing data | 76 |
| History of hypertension | |
| No | 254 (38.8) |
| Yes | 400 (61.2) |
| Missing data | 76 |
| Tumor laterality | |
| Left | 344 (47.1) |
| Right | 386 (52.9) |
| Perioperative complications | |
| No complications | 589 (88.8) |
| Complications | 74 (11.2) |
| Missing data | 67 |
| Perioperative blood transfusion | |
| No transfusion | 635 (95.5) |
| Perioperative transfusion | 30 (4.5) |
| Missing data | 65 |
| Charlson comorbidity index | |
| 0 | 342 (52.2) |
| 1 | 135 (20.6) |
| 2 | 93 (14.2) |
| ≥3 | 84 (12.8) |
| Missing | 76 |
| Tumor histology | |
| Benign | 110 (15.1) |
| Angiomyolipoma | 35 (31.8) |
| Oncocytoma | 55 (50.0) |
| Complex cyst | 6 (5.5) |
| Other | 14 (12.7) |
| Malignant | 620 (84.9) |
| Age at surgery (y) (n=730) | 57.5±12.1 |
| Body mass index (kg/m2) (n=698) | 30.6±6.9 |
| Nephrometry score (n=544) | 7.2±1.8 |
| Radiographic tumor size (cm) (n=730) | 2.5±0.8 |
| Preoperative hemoglobin (g/dL) (n=611) | 13.9 (1.5) |
| Preoperative creatinine (mg/dL) (n=658) | 0.93 (0.34) |
Values are presented as number (%) or mean±standard deviation.
RCC, renal cell carcinoma; RAPN, robotic-assisted partial nephrectomy.