Table 5.

Univariate and multivariate analysis of prognostic factors for survival.

	Univariate (HR, 95%CI)		Multivariate (HR, 95%CI)	P
Age ≥ 80	1.71 (1.02–2.86)	0.042	1.19 (0.68–2.08)	0.553
ASA ≥ 3	1.15 (0.85–1.56)	0.378	-
Positive lymph nodes	1.20 (1.40–2.83)*	<0.001	1.70 (1.11–2.60)	0.015
Operative time	1.00 (1.00–1.00)	0.248	-
Perioperative transfusion	1.26 (0.85–1.87)	0.249	-
Postoperative transfusion	1.33 (0.87–2.03)*	0.183	1/06 (0.67–1.68)	0.802
Vascular invasion	1.97 (1.43–2.70)*	<0.001	1.78 (1.22–2.59)	0.003
Major morbidity (Grade 3/4/5)	1.15 (0.85–1.56)*	0.079	1.38 (0.92–2.08)	0.118
LOS	1.02 (1.00–1.03)*	0.048	1.00 (0.971.02)	0.846

^*means p<0.2,OR > 1 indicating shorter survival.