Table 3.

Predictors of stent patency.

Variables	Univariate analysis			Multivariate analysis
	Hazard ratio	95% CI	P value	Hazard ratio	95% CI	P value
Age	0.996	0.950-1.044	0.856
Gender
Male	1
Female	1.489	0.689-3.216	0.311
Tumor stage
III	1
IV	0.647	0.244-1.718	0.647
ECOG PS	0.673	0.445-1.020	0.062	0.668	0.441-1.012	0.057
Bismuth type
II	1			1
III	0.362	0.122-1.075	0.067	0.354	0.119-1.052	0.062
IV	0.877	0.325-2.363	0.795	0.827	0.306-2.237	0.709
TBIL before treatment	1.000	0.997-1.004	0.841
TBIL after treatment	0.993	0.980-1.006	0.302
Ca19-9	1.000	1.000-1.000	0.511
Stent insertion
Unilateral	1
Bilateral	1.090	0.510-2.331	0.823
Post-operative chemotherapy
No	1
Yes	1.436	0.669-3.081	0.353

ECOG PS, Eastern Cooperative Oncology Group performance status; TBIL, total bilirubin.