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

Table 3 Domain-specific multivariable analysis of strategy selection-related factors

Characteristics	Success/failure	P value	Exp(B)	95%CI for Exp(B)
Timing		0.300
Emergency	56/30		0.757	0.447	1.282
Elective	192/77		1.321	0.78	2.237
Location		0.672
Operating room	129/50		1.155	0.593	2.25
Puncture room	81/40		0.863	0.43	1.732
Bedside	38/17		0.866	0.444	1.687
Angle		0.835
45°-135°	185/80		0.945	0.556	1.607
Other	63/27		1.058	0.622	1.799
Length		0.649
≥ 12 (cm)	63/30		1.129	0.67	1.901
< 12 (cm)	185/77		0.886	0.526	1.492
Position		0.598
Right side	31/12		1.214	0.59	2.497
Left side	217/95		0.824	0.4	1.695
Ultrasound probe		0.026
Conventional	198/96		0.451	0.223	0.911
Puncture-specific	50/11		2.219	1.098	4.486
Catheter diameter		0.440
≤ 8 French	191/78		0.812	0.478	1.379
> 8 French	57/29		1.232	0.725	2.094
Operator change		0.762
Yes	8/1		1.242	0.306	5.04
No	47/34		0.805	0.198	3.267
Target change		0.101
Yes	6/4		5.962	0.704	50.501
No	49/31		0.168	0.02	1.421

“Puncture-specific” refers to dedicated biopsy/guidance ultrasound probes.