Factors Associated with the Technical Success of Bilateral Endoscopic Metallic Stenting with Partial Stent-In-Stent Placement in Patients with Malignant Hilar Biliary Obstruction

Table 3

The factors for technical success of PSIS.

	Bilateral SEMS placement	Unilateral SEMS placement	Univariate analysis	Multivariate analysis
			value	value	OR (95% CI)
Age, (years)			0.741
Male	26	6	0.229
Bile duct cancer	28	7	0.285
Drainage before SEMS placement	10	3	0.647
EST before SEMS placement	13	2	0.232
Bismuth classification, type III, IV	28	7	0.285
Laser-cut-type SEMS	33	9	0.332
Use of dilation devices	27	11	0.069
Delivery system size of placed	17	1	0.023	0.033	10.769 (1.205-96.212)

MHBO: malignant hilar biliary obstruction; SEMS: self-expandable metallic stent; EST: endoscopic sphincterotomy; OR: odds ratio; CI: confidence interval; PSIS: partial stent-in-stent.