Clinical efficacy and safety of flexible ureteroscopy and percutaneous nephrolithotomy for large kidney stones: A retrospective comparative study

Table 1 Baseline data at admission

Features	FURS, n = 145	PCNL, n = 105	P value
Age in years	43.67 ± 5.25	42.91 ± 5.07	0.253
Sex			0.945
Male	89 (61.38)	64 (60.95)
Female	56 (38.62)	41 (39.05)
Diameter of kidney stones in cm	2.83 ± 0.36	2.79 ± 0.32	0.365
Type of kidney stones
Pyelolithiasis	13 (8.97)	10 (9.52)	0.880
Lower calyceal calculi	32 (22.07)	27 (25.71)	0.926
Middle calyceal calculi	49 (33.79)	33 (31.43)	0.694
Upper calyceal calculi	51 (35.17)	35 (33.34)	0.763
Smoking history			0.939
Yes	49 (33.79)	35 (33.33)
No	96 (66.21)	70 (66.67)
Drinking history			0.642
Yes	62 (42.76)	48 (45.71)
No	83 (57.24)	57 (54.29)
Living environment			0.461
Town	99 (68.28)	67 (63.81)
Countryside	46 (31.72)	38 (36.19)
Side of kidney stones			0.860
Left	84 (57.93)	62 (59.05)
Right	61 (42.07)	43 (40.95)

Data are n (%) or mean ± standard deviation. FURS: Flexible ureteroscopy; PCNL: Percutaneous nephrolithotomy.