Efficacy of the New Double-Layer Stent for Unresectable Distal Malignant Biliary Obstruction: A Single-Center Retrospective Study

Table 3

Risk factors for stent occlusion by univariate analysis.

	HR; (95% CI)	P
Age (>65 versus 65 years)	0.951 (0.637–1.419)	0.507
Gender	0.910 (0.600–1.380)	0.427
Pancreatic cancer stage	1.348 (0.904–2.011)	0.100
IVb chemotherapy group	0.945 (0.651–1.370)	0.483
DLS	0.938 (0.647–1.359)	0.476
New DLS	0.877 (0.609–1.262)	0.341
UMS	1.286 (0.789–2.097)	0.205

CI: confidence interval; HR: hazards ratio.