[Table/Fig-2]:

Patients’ demographics.

Characteristics	Group 1	Group 2	Total
Number	47	45	92
Mean Age	29.6	35.4
Sex distribution
Male	29	25	54
Female	18	20	38
Laterality
Right	20	22	42
Left	27	23	50
Anomalies of kidney
Previous open stone surgery	9	1	10
Horse shoe kidney	1	1	2
Bilateral duplex kidney	2	0	2
Bifid pelvis	9	3	12
Malrotated kidney	8	4	12
Stone size (Longest diameter)
10-20 mm	2	40	42
20-30 mm	15	5	20
30-40 mm	22	0	22
More than 40 mm	8	0	8
Average stone size (mm)	28.3	17.2
Stone opacity
Radio opaque	43	31	74
Radio lucent	4	14	18
Stone type
Partial stag horn	27
Complete stag horn	20
Upper ureter		14
Renal pelvis		20
Lower calyceal		11
Site of Initial puncture (n=92)
Upper calyceal	18	14	32
Mid calyceal	4	12	16
Lower calyceal	25	19	44