Table 1.
Preoperative characteristics by surgery type before and after propensity score matching
| Variable | Before propensity score matching | After propensity score matching | ||||
|---|---|---|---|---|---|---|
| LPN (n = 109) | RPN (n = 61) | P value | LPN (n = 58) | RPN (n = 58) | P value | |
| Age, y, mean (SD) | 50.6 (9.5) | 52.8 (10.3) | .168 | 50.6 (9.8) | 52.0 (10.0) | .449 |
| Gender (male), n (%) | 63 (57.8) | 31 (50.8) | .380 | 32 (55.2) | 31 (53.4) | .852 |
| Diabetes mellitus (yes), n (%) | 13 (11.9) | 7 (11.5) | .930 | 6 (10.3) | 7 (12.1) | .769 |
| Hypertension (yes), n (%) | 32 (29.4) | 13 (21.3) | .254 | 14 (24.1) | 13 (22.4) | .826 |
| ASA score (≥3), n (%) | 9 (8.3) | 6 (9.8) | .728 | 3 (5.2) | 6 (10.3) | .298 |
| RENAL score, median (IQR) | 8 (7‐9) | 8 (7‐9) | .535 | 8 (7‐9) | 8 (7‐9) | .635 |
| Left tumor, n (%) | 49 (45.0) | 32 (52.5) | .347 | 29 (50.0) | 32 (55.2) | .577 |
| Solitary kidney, n (%) | 14 (12.8) | 2 (3.3) | .040 | 3 (5.2) | 2 (3.4) | .648 |
| Hilar tumor, n (%) | 21 (19.3) | 16 (26.2) | .291 | 12 (20.7) | 15 (25.9) | .510 |
| Mean tumor size (cm), mean (SD) | 4.9 (0.7) | 5.0 (0.7) | .475 | 4.9 (0.7) | 5.0 (0.7) | .327 |
| Preoperative creatinine, umol/L, mean (SD) | 90.1 (25.3) | 87.1 (19.4) | .428 | 85.9 (24.5) | 87.0 (19.6) | .788 |
| Preoperative eGFR, mL/min, mean (SD) | 84.2 (18.7) | 88.5 (14.2) | .098 | 88.5 (17.0) | 88.7 (14.4) | .950 |
| Preoperative CKD, n (%) | 12 (11.0) | 1 (1.6) | .027 | 1 (1.7) | 1 (1.7) | 1.000 |
| Preoperative hemoglobin, g/L, mean (SD) | 116.3 (20.6) | 123.0 (17.2) | .025 | 122.7 (17.6) | 121.7 (15.8) | .750 |
Bold indicates statistical significance value (P < 0.05)
Abbreviations: ASA: American Society of Anesthesiologists; CKD: chronic kidney disease; IQR: inter‐quartile range; SD: standard deviation.