Table 3. Univariate and multivariate analyses of overall survival.

	Univariate analysis			Multivariate analysis a
	P -value	Odds ratio	95% CI	P -value	Odds ratio	95% CI
Sex	0.187	0.869	0.706–1.070	—	—	—
Age	<0.001	1.474	1.217–1.784	0.010	1.319	1.068–1.629
Body mass index	<0.001	0.503	0.419–0.605	0.233	0.884	0.722–1.802
Tumour location	0.088	0.891	0.781–1.017	0.276	0.929	0.813–1.061
White cell count	0.161	1.567	0.837–2.933	—	—	—
Neutrophils	<0.001	2.519	1.668–3.805	0.153	0.681	0.402–1.153
Lymphocytes	0.212	0.693	0.391–1.231	—	—	—
CEA	<0.001	3.121	2.518–3.868	0.107	1.234	0.955–1.595
CA19-9	<0.001	4.059	3.189–5.168	0.177	1.213	0.916–1.605
Tumour stage (I/II/III/IV)	<0.001	2.974	2.724–3.247	<0.001	2.909	2.616–3.234
mGPS (0, 1and 2)	<0.001	4.578	3.324–6.306	0.007	1.845	1.184–2.875

Abbreviations: CEA=carcinoembryonic antigen; mGPS=modified Glasgow prognostic score.

^aFactors <0.10 in univariate analysis were included in the multivariate analysis.