Clinical Factors to Predict Difficult Ureter during Ureteroscopic Lithotripsy

Table 2

Multivariate logistic regression models.

	Full				Reduced
	OR	95% CI			OR	95% CI
		Lower	Upper			Lower	Upper
Age	0.976	0.939	1.015	0.226
Sex (female)	1.097	0.269	4.478	0.897
BMI	1.037	0.889	1.209	0.648
Major axis (>8 mm)	8.852	2.402	32.615	0.001	4.495	1.791	11.278	0.001
Stone location (renal alone)	3.945	0.997	15.604	0.050
Maximum HU	1.001	0.999	1.003	0.365
Hydronephrosis	2.259	0.636	8.025	0.208
Urolithiasis of the affected side	0.539	0.157	1.846	0.325
Abdominal surgery	0.642	0.135	3.045	0.577
Traceability (negative)	7.947	2.324	27.171	0.001	7.565	2.693	21.248	<0.001
Smoking status	2.912	1.007	8.427	0.049	3.196	1.164	8.773	0.024
Absence of DM	8.110	1.167	56.374	0.034	5.813	1.121	30.142	0.036
HT	0.615	0.208	1.819	0.380
DL	1.174	0.351	3.929	0.795
Cardio/cerebrovascular disease	2.740	0.418	17.947	0.293

Statistical significance. BMI, body metabolic index; CI, confidence interval; DL, dyslipidemia; DM, diabetes mellitus; HT, hypertension; OR, odds ratio.