Table 6.

Multivariate analysis of long-term survival in patients with distal cholangiocarcinoma

Variable	RR	95%CI	P
CA19-9	0.974	0.607–1.561	0.911
CA19-9/GGT	2.837	1.727–4.660	0
Blood transfusion	0.763	0.513–1.135	0.182
Degree of differentiation	1.725	1.140–2.609	0.01
LN metastasis	2.05	1.336–3.144	0.001

CA19-9: carbohydrate antigen 19-9; GGT: γ-glutamyltransferase; LN: lymph node.