Prognostic predictive values of gemcitabine sensitivity-related gene products for unresectable or recurrent biliary tract cancer treated with gemcitabine alone

Table 4 Multivariate analysis for overall survival using variables including hENT1 and dCK

Variable	Comparison	HR	95% CI	P value
Primary tumor site	Gallbladder vs. extrahepatic bile duct	1.617	0.596 to 4.389	0.345
Recurrence or unresectable	Unresectable vs. recurrence	1.707	0.511 to 5.700	0.384
Histological type	Poor vs. well/moderately	1.117	0.354 to 3.519	0.851
hENT1 expression	High vs. low	0.270	0.097 to 0.748	0.012
dCK expression	High vs. low	0.778	0.284 to 2.132	0.625

CI, confidence interval; dCK, deoxycytidine kinase; hENT1, human equilibrative nucleoside transporter; HR, hazard ratio.

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