Table 1.

Demographic data

Variables	MiniPCNL	RIRS	P
Renal units	40	40
Age (years)	35.6	40.45	0.447
Sex (male:female)	25:15	32:8	0.069
BMI	23	25.09
Laterality (right: left)	15:25	26:14	0.012
Stone size (mm)	12.35	12.90	0.449
Stone distribution
Upper calyx	2	2	0.042
Mid calyx	8	10	0.147
Lower calyx	8	6	0.589
Pelvis	22	22	0.247
History of DJ stenting	4	40	<0.001

BMI: Body mass index, mini-PCNL: Minimally invasive percutaneous nephrolithotomy, RIRS: Retrograde intrarenal surgery, DJ: Double J