Table 3.

Univariate analysis of factors affecting complications after S-PCNL.

Factor	Complications, n		P
	No	Yes
Operative duration (min)
90–140	23	4	<0.001
141–180	2	11
Gender
Male	19	9	0.311
Female	6	6
Obesity
No	16	9	1
Yes	9	6
Side
Left	11	7	1
Right	14	8
Previous treatment
No	24	14	1
Yes	1	1
Staghorn stone burden
Complete	4	12	<0.001
Partial	21	3
Access
Two	8	9	0.107
One	17	6