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

Table 1 Domain-specific multivariable analysis of medical provider-related factors

	Success/failure	P value	Exp(B)	95%CI for Exp(B)
Operator experience		0.007
> 20 cases	112/65		1.92	1.19	3.10
≤ 20 cases	136/42		0.52	0.32	0.84
Operator title		0.001
Senior	83/27		4.22	1.77	10.06
Junior	165/80		0.24	0.10	0.57
Guide experience		0.818
> 20 cases	86/38		1.06	0.64	1.75
≤ 20 cases	162/69		0.94	0.57	1.55
Guide title		0.327
Senior	89/32		1.29	0.78	2.14
Junior	159/75		0.78	0.47	1.29
Specialty		0.250
Surgery	125/49		0.68	0.35	1.32
Internal medicine	85/38		2.36	0.93	5.97
Emergency medicine	38/20		1.48	0.76	2.89
Level of cooperation		0.039
Good	235/95		2.53	1.05	6.09
Poor	13/12		0.40	0.16	0.95

“Senior” denotes attending physician or equivalent title.