Table 2.

Patients’ Descriptive Statistics

	Group A	Group B	P-value
N° patients	90	90	1
Age mean years ± SD	55.7 ± 24.8	59.4 ± 19.8	0.12
Sex (M/F)	42/48	45/45	0.45
Height cm (mean ± SD)	171.1 ± 12.5	175.8 ± 14.1	0.16
Weight kg (mean ± SD)	73.1 ± 10.6	77.9 ± 11.7	0.22
R/L kidney	38/52	47/43	0.39
Hounsfield unit ± SD	899 ± 587	974 ± 549	0.19
Stone diameter mm ± SD	13.11 ± 4.89	15.82 ± 4.12	0.27
Preoperative positive urine culture % (n)	5.5 (5)	6.6 (6)	0.32