Predictors of the technical success of ultrasound-guided percutaneous transhepatic biliary drainage for biliary obstruction

Table 2 Domain-specific multivariable analysis of patient-related factors

	Success/failure	P value	Exp(B)	95%CI for Exp(B)
Age		0.848
> 65 years	151/67		0.93	0.568	1.522
≤ 65 years	97/40		1.075	0.657	1.759
Gender		0.823
Male	180/77		0.907	0.532	1.545
Female	68/30		1.103	0.647	1.879
BMI		0.781
≤ 24 (kg/m2)	208/90		1.097	0.567	2.125
> 24 (kg/m2)	40/17		0.911	0.47	1.765
History of upper abdominal surgery		0.343
No	239/102		0.616	0.19	1.996
Yes	9/5		1.625	0.501	5.269
Liver cirrhosis/fibrosis		0.827
No	229/92		0.967	0.41	2.283
Yes	20/11		1.034	0.438	2.439
Ascites		0.695
No	241/103		0.832	0.215	3.218
Yes	7/4		1.202	0.311	4.648
Etiology		0.917
Tumor	234/97		0.798	0.295	2.157
Other	15/6		1.254	0.464	3.392
Obstruction site		0.696
Supra-confluence	114/47		0.964	0.595	1.563
Infra-confluence	134/60		1.037	0.64	1.681
Bilirubin		0.038
> 340 (μmol/L)	123/27		3.366	1.157	9.796
170-340 (μmol/L)	119/75		1.737	0.627	4.811
< 170 (μmol/L)	6/5		0.576	0.208	1.595
Bile duct diameter		0.002
≥ 6 (mm)	167/60		2.845	1.738	4.656
< 6 (mm)	81/57		0.351	0.215	0.575

Bilirubin > 340 μmol/L is defined as severe hyperbilirubinemia. BMI: Body mass index.