Fluoroscopy Is Essential in Retrograde Intrarenal Surgery

Table 1

Preoperative data of the patients.

	Group 1 (504)	Group 2 (108)
Age	43.11 ± 3.4	41.18 ± 3.7	0.45
Sex
Women	192 (29%)	32 (29%)	0.18
Men	312 (61%)	76 (71%)
Stone size (mm^2)	11.57 ± 2.6	11.43 ± 2.8	0.25
Laterality
Right	254 (%51)	58 (%57)	0.26
Left	250 (%49)	50 (%43)
Stone position			0.10
Lower pole	139 (%27.5)	28 (%25.9)	0.13
Middle pole	33 (%6.5)	18 (%7.4)	0.09
Upper pole	26 (%5.1)	9 (%8.3)	0.07
Pelvis	222 (%44.0)	43 (%39.8)	0.13
More than one pole	84 (%16.6)	18 (%16.6)	0.10
Number of stones
1	376 (%74.4)	78 (%72.2)	0.10
2	98 (%19.3)	26 (%24)
3	18 (%3.3)	2 (%1.9)
4	11 (%2.0)	2 (%1.9)
Stone Hounsfield unit (HU)	1047	684	0.001