Table 1.

The patients’ preoperative characteristics.

Variable	Group A (mini-PCNL)	Group B (RIRS)	P
Sex, n (%)			0.727
Males	38 (63.3)	34 (56.7)
Females	22 (36.7)	26 (43.3)
Mean (SD; range):
Age, years	37.23 (9.24; 20–56)	37.7 (9.76; 19–57	0.981
Stone size, cm	1.47 (0.3; 0.8–2.0)	1.41 (0.3; 0.8–20)	0.392
Preoperative Hb, g/dL, mean (SD; range)	13.78 (0.797; 12.3–15.3)	13.69 (0.755; 12.4–15.0)	0.796
Right-sided stones, n (%)	34 (56.7)	38 (63.3)	0.727

Hb, haemoglobin.