Table 1.

Patient characteristics

	LPN group	OPN group	p value
No. patients	72	75
Patient age at surgery Mean ± SD (range)	60.7 ± 11.2 (29 – 82)	58.3 ± 13.7 (23 – 86)	0.256
Gender (male / female)	50 / 22	57 / 18	0.372
Side (R / L)	40 / 32	40 / 35	0.787
Tumor size (mm)	24.8 ± 7.3 (11 – 42)	29.5 ± 9.3 (13 – 52)	0.001
Clinical T stage (1a / 1b)	71 / 1	67 / 8	0.019
Endophyticity (mm)	14.4 ± 6.5 (4 – 31)	21.0 ± 7.2 (7 – 44)	<0.001
Distance from the sinus (mm)	7.6 ± 5.3 (0 – 23)	2.9 ± 3.4 (0 – 13)	<0.001
Distance from the renal equator (mm)	12.1 ± 12.1 (0 – 38)	11.1 ± 10.4 (0 – 38)	0.591
Hilar designation (y / n)	2 / 70 (2.8%)	12 / 63 (16.0%)	0.006
Polar location; upper / middle / lower pole	10 / 39 / 23	14 / 38 / 23	0.691
Inside designation (y / n)	12 / 60 (16.7%)	29 / 46 (38.7%)	0.003
R.E.N.A.L. nephrometry score	6.4 ± 1.4 (4 – 9)	7.7 ± 1.4 (5 – 10)	<0.001