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 4

Clinical characteristics of patients with bilateral SEMS placement.

	All participants,			Matched pairs,
	Used delivery system of SEMS			Used delivery system of SEMS
	<6.0 Fr	≥6.0 Fr	value	<6.0 Fr	≥6.0 Fr	value
Age,			0.31			0.427
Male/female, (%)	13/4 (76/24)	13/6 (68/32)	0.436	13/4 (76/24)	11/6 (65/35)	0.452
The cause of MHBO, bile duct cancer/others, (%)	14/3 (82/18)	14/5 (82/18)	0.414	14/3 (82/18)	12/5 (71/29)	0.344
Drainage before SEMS placement, +/-, (%)	6/11 (35/65)	4/15 (21/79)	0.281	6/11 (35/65)	4/13 (24/76)	0.452
Existence of EST before SEMS placement, +/-, (%)	9/8 (53/47)	4/15 (21/79)	0.047	9/8 (53/47)	4/13 (24/76)	0.151
Bismuth classification, II/III, IV, (%)	5/12 (29/71)	3/16 (16/84)	0.281	5/12 (29/71)	3/14 (18/82)	0.344

MHBO: malignant hilar biliary obstruction; SEMS: self-expandable metallic stent; EST: endoscopic sphincterotomy.