Table 1. Baseline characteristics.
| Variables | Median (interquartile range) or counts (%) | P | ||
|---|---|---|---|---|
| Total (N = 149) | OPN (N = 64) | RPN (N = 85) | ||
| Age, years | 52.0 (42.0–60.0) | 52.0 (40.5–60.5) | 53.0 (42.0–60.0) | 0.947 |
| Sex, male | 97 (65.1%) | 42 (65.6%) | 55 (64.7%) | 1.000 |
| BMI, kg/m2 | 24.7 (22.9–27.1) | 24.8 (22.9–26.5) | 24.7 (22.9–27.5) | 0.969 |
| ECOG score, ≥1 | 3 (2.0%) | 2 (3.1%) | 1 (1.2%) | 0.577 |
| ASA score, ≥2 | 4 (2.7%) | 2 (3.1%) | 2 (2.4%) | 0.897 |
| CCI score | 2 (1–3) | 2 (1–3) | 2 (1–2) | 0.642 |
| Diabetes mellitus, yes | 19 (12.8%) | 5 (7.8%) | 14 (16.5%) | 0.141 |
| Hypertension, yes | 53 (35.6%) | 20 (31.3%) | 33 (38.8%) | 0.389 |
| *CKD, stage≥3 | 6 (4.0%) | 3 (4.7%) | 3 (3.5%) | 1.000 |
| Preoperative creatinine, mg/dL | 0.88 (0.72–1.00) | 0.91 (0.77–1.00) | 0.86 (0.69–0.96) | 0.842 |
| Preoperative eGFR, ml/min/1.73 m2 | 85.6 (76.4–101.5) | 83.3 (74.2–98.5) | 87.1 (79.8–103.8) | 0.085 |
| Clinical stage | 0.019 | |||
| T1a | 78 (52.3%) | 42 (65.6%) | 36 (42.4%) | |
| T1b | 51 (34.2%) | 16 (25.0%) | 35 (41.2%) | |
| ≥ T2 | 20 (13.4%) | 6 (9.4%) | 14 (16.5%) | |
| RENAL score | 10.0 (10.0–10.0) | 10.1 (10.0–10.0) | 10.2 (10.0–10.0) | 0.346 |
| Laterality, Lt. | 85 (57.0%) | 36 (56.3%) | 49 (57.6%) | 0.869 |
ASA, American Society of Anesthesiologists; BMI, body mass index; CCI, Charlson comorbidity index; CKD, chronic kidney diseas; ECOG, Eastern Cooperative Oncology Group; eGFR, estimated glomerular filtration rate; OPN, open partial nephrectomy; RPN, robotic partial nephrectomy
*GFR < 60 ml/min/1.73m2