Table 2.

Multivariate analysis of survival according to the clinicopathological factors of patients who underwent surgical resection (R0, R1 and R2) for middle and distal extrahepatic bile duct cancers

Variable		Hazard ratio	95%CI	P value
AJCC stage	0, I	1		0.023
	II	4.572	1.473-14.183
	III	-	-
	IV	11.185	1.061-117.922
LVI	-	1		0.002
	+	2.942	1.510-5.733

LVI: Lymphovascular invasion.