Table 1. Demographic and Clinical Data .

Variable	All Cases (N = 146)	OCL (n=80)	PCCL (n=39)	TULL (n=27)	P Value
Gender/male	129	73	34	22
Age (y)	8.3±5.1 (0.5-17.5)	7.6±5.1 (0.5-17.5)	9.2±5.1 (1.5-17)	9±5 (1.5-17)
Stone size (cm)	2.76±1.07 (1-6.2)	2.89±1.17 (1-6.2)	2.6±1 (1-4.9)	2.54±0.8 (1-4.5)	0.618
MOT (min)	29.15±7.12 (15-54)	26.06±6.32 (15-48)	30.54±5.27 (22-42)	36.30±5.97 (28-54)	0.000
MHS (d)	2.85±1.23 (1-8)	3.55±1 (2-8)	2.49±0.72 (2-4)	1.3±0.66 (1-4)	0.001
Stone composition	94: Calcium-oxalate (51), ammonium acid urate (28), other (15)	47: calcium-oxalate -oxalate (28), ammonium acid urate (19)	32: calcium-oxalate -oxalate (23), ammonium acid urate (9)	N/A

Abbreviations: OCL, open cystolithotomy; PCCl, Percutaneous cystolithotomy; TULL, transurethral cystolithotripsy with holmium-YAG laser; MOT, mean operative time; MHS, mean hospital stay.

N/A: Not Available due to vaporization mechanism of laser.