TABLE 2.

Univariate and multivariate analysis for predictors of overall survival (n = 100)

Predictor	Univariate analysis			Multivariate analysis
	HR	95% CI	p value	HR	95% CI	p value
Clinical predictors
Age, per year	1.03	1.01–1.06	0.011	1.04	1.01–1.07	0.009
Male sex	0.89	0.54–1.47	0.64	–	–	–
Preoperative predictors
Radiographic
Mesenteric vessel involvement	2.25	0.51–9.84	0.28	–	–	–
Metastatic disease	6.61	1.55–28.12	0.011	2.04	1.11–3.74	0.022
Tumor location
Head	–	–	–	–	–	–
Tail	1.48	0.66–3.30	0.34	–	–	–
Tumor diameter, per cma	1.00	0.86–1.17	0.96	–	–	–
Laboratory
CA19-9, per log unitb	1.09	0.97–1.21	0.14	1.09	0.98–1.22	0.12
CTC count, per log unit	1.69	1.28–2.25	< 0.001	1.38	1.01–1.88	0.040

HR hazard ratio, CI confidence interval, CA19-9 cancer antigen 19-9, CTC circulating tumor cell

^an = 91

^bn = 90