Prognostic analysis of surgical treatment of peripheral cholangiocarcinoma: Two decades of experience at Chang Gung Memorial Hospital

Table 6 Cox’s proportional hazards analysis.

Factors	Relative risk (95% confidence interval)	P
Mucobilia (without mucobilia/mucobilia )	2.185 (1.324–3.605)	0.002
Tumor spreading type (non-papillary/papillary)	1.455 (1.028–2.060)	<0.001
Type of operation (non-hepatectomy/hepatectomy)	1.946 (1.477–2.564)	<0.001
Tumor staging
(II/I)	1.637 (0.786–3.406)	0.188
(III/I)	3.334 (1.615–6.882)	0.001
(IV/I)	4.049 (1.940–8.449)	<0.001
Post-operative chemotherapy (no chemotherapy/chemotherapy)	1.823 (1.413–2.353)	<0.001