Table 5.

Univariate and Multivariate analysis of OS.

Variable	Univariable Cox regression			Multivariable Cox regression
	HR	95%CI	P	HR	95%CI	P
Age(≤55/>55)	1.139	0.533-2.432	0.737
Gender(Male/Female)	0.832	0.349-1.985	0.679
Distant metastasis(Yes/No)	1.436	0.301-1.609	0.397	2.076	0.856-5.031	0.106
Tumor location(Head/Tail or Body)	3.018	1.125-8.097	0.028	3.368	1.229-9.231	0.018
Regimen(GS/GS+A)	2.46	1.120-5.404	0.025	2.556	1.139-5.733	0.023