Table 1.

Demographic information of the patients.

Variable	Group A	Group B	p -value
No. of patients	72	67
Age (years), median (IQR)	57 (31–68)	59 (44–70)	0.16
Male, n (%)	51 (70.8%)	41 (61.2%)	0.89
BMI (kg/m2), median (IQR)	23.38 (17–33)	24.16 (20–32)	0.11
Stone status
Stone size (cm), median (IQR)	3.29 (2.6–5.2)	2.97 (2.5–3.7)	0.43
Partial staghorn stone, n (%)	19 (26.4%)	24 (35.8%)	0.76
Complete staghorn stone, n (%)	27 (37.5%)	29 (43.3%)
Other type of complex renal calculi, n (%)	26 (36.1%)	14 (20.9%)
Location of stones			0.24
Left side, n (%)	31 (43.1%)	35 (52.2%)
Right side, n (%)	41 (56.9%)	32 (47.8%)
Preoperative hydronephrosis			0.91
No or mild level, n (%)	43 (59.7%)	51 (76.1%)
Middle or severe level, n (%)	29 (40.3%)	16 (23.9%)

BMI, body mass index.