Robot-Assisted versus Laparoscopic Partial Nephrectomy for Giant Sporadic Renal Angiomyolipomas of ≥7 cm: A Propensity Score-Matched Analysis

Table 1

Preoperative characteristics by surgery type before and after propensity score matching.

Variables	Before propensity score matching			After propensity score matching
	RAPN (n = 41)	LPN (n = 52)		RAPN (n = 41)	LPN (n = 41)
Gender (female), n (%)	32 (78.0%)	33 (63.5%)	0.324	32 (78.0%)	29 (70.7%)	0.448
Age (years), mean (SD)	41.7 (12.4)	43.6 (1.03)	0.498	41.7 (12.4)	43.7 (10.6)	0.429
BMI (kg/m^2), mean (SD)	23.2 (1.06)	23.2 (1.02)	0.963	23.1 (1.05)	23.1 (0.90)	0.973
Mean tumor size (cm), median (IQR)	8.2 (7.5, 9.6)	8.2 (7.5, 9.5)	0.804	8.2 (7.5, 9.6)	8.1 (7.5, 9.3)	0.693
Left tumor, n (%)	25 (61.1%)	27 (51.9%)	0.946	25 (61.1%)	19 (46.3%)	0.184
RENAL score, median (IQR)	9 (8, 10)	8 (7, 9)	0.01	9 (8, 10)	9 (8, 9)	0.297
Symptoms
Lumbage, n (%)	28 (68.3%)	26 (50.0%)	0.964	28 (68.3%)	20 (48.8%)	0.073
Hematuresis, n (%)	5 (12.2%)	2 (3.8%)	0.13	5 (12.2%)	1 (2.4%)	0.09
Tumor rupture, n (%)	5 (12.2%)	9 (17.3%)	0.494	5 (12.2%)	8 (19.5%)	0.364
Underlying disease
Hypertension, n (%)	5 (12.2%)	6 (11.5%)	0.922	5 (12.2%)	5 (12.2%)	1
Diabetes, n (%)	3 (7.3%)	2 (3.8%)	0.922	3 (7.3%)	1 (2.4%)	0.305
Abdominal surgery history, n (%)	7 (17.1%)	9 (17.3%)	0.976	7 (17.1%)	7 (17.1%)	1
Preoperative SAE, n (%)	2 (4.9%)	6 (11.5%)	0.255	2 (4.9%)	4 (9.8%)	0.396
GFR (mL/min/1.73 m^2), mean (SD)	82.38 (5.63)	82.61 (5.71)	0.832	82.38 (5.63)	82.51 (5.62)	0.906

SD: standard deviation; IQR: interquartile range; BMI: body mass index; AML: angiomyolipoma; GFR: glomerular filtration rate.