Clinical Factors to Predict Difficult Ureter during Ureteroscopic Lithotripsy

Table 1

Patients background.

		DU	Non-DU
N		31	125
Age		55.1 (11.9)	59.3 (13.3)	0.107
Sex	Female	7 (22.5)	22 (17.6)	0.523
BMI (kg/m^2)		24.3 (3.9)	24.8 (3.9)	0.581
Side	Left	15 (48.3)	68 (54.4)	0.548
Stone location	Renal alone	15 (48.3)	54 (44.0)	0.603
Major axis (mm)		8.8 (3.9)	10.9 (4.5)	0.018
Maximum Hounsfield unit		1202.5 (372.0)	1257.3 (355.3)	0.445
Hydronephrosis	Present	15 (48.3)	66 (52.8)	0.660
Traceability	Positive	15 (48.3)	104 (83.2)	<0.001
History	Urolithiasis of the affected side	6 (19.3)	39 (31.2)	0.193
	Abdominal surgery	3 (9.6)	22 (17.6)	0.282
	Smoking habit	16 (51.6)	54 (43.2)	0.399
	DM	2 (6.4)	29 (23.2)	0.105
	HT	12 (38.7)	68 (54.4)	0.118
	DL	8 (25.8)	29 (23.2)	0.760
	Cardiovascular/cerebrovascular disease	3 (9.6)	8 (6.4)	0.523

Statistical significance. BMI, body metabolic index; DL, dyslipidemia; DM, diabetes mellitus; DU, difficult ureter; HT, hypertension.