Table 1.

Results of the univariate analysis between all variables and overall survival.

Variable	Statistics	HR (95% CI)	p-value
Sex, n (%)
Male	77 (59.23)	1.0
Female	53 (40.77)	0.58 (0.37–0.91)	0.02
Age (years), mean ± SD	62.47 ± 8.59	1.00 (0.98–1.03)	0.79
BMI (kg/m2), mean ± SD	23.28 ± 9.36	1.01 (0.99–1.03)	0.37
Tumor size (cm) (median, range)	3.60 ± 1.47	0.95 (0.82–1.09)	0.46
Location, n (%)
Head	76 (58.46)	1.0
Body and tail	54 (41.54)	0.58 (0.37–0.92)	0.02
Grade of differentiation, n (%)
Well–moderate	101 (77.69)	1.0
Poor–undifferentiated	29 (22.31)	1.61 (0.97–2.67)	0.07
T category, n (%)
T1	15 (11.54)	1.0
T2	74 (56.92)	2.40 (1.03–5.60)	0.04
T3	41 (31.54)	1.59 (0.64–3.95)	0.32
N category, n (%)
N0	42 (32.31)	1.0
N1	40 (30.77)	1.23 (0.68–2.23)	0.49
N2	48 (36.92)	2.09 (1.22–3.61)	0.008
Peripancreatic fat invasion, n (%)
No	45 (34.62)	1.0
Yes	85 (65.38)	1.72 (1.07–2.77)	0.03
Resection margin, n (%)
R0	72 (55.38)	1.0
R1	58 (44.62)	1.24 (0.81–1.92)	0.32

HR, hazard ratio; CI, confidence interval; BMI, body mass index.