Table 6.

Cox Proportional Multivariate Hazards Regression for Distant Recurrence-Free Survival

Factor	Odds ratio	95% CI	p Value
Age	1.00	0.99–1.01	0.280
Gender (reference, female)	1.07	0.88–1.30	0.489
Tumor size	1.00	0.99–1.01	0.982
Tumor grade
1 (reference)
2	1.29	0.90–1.85	0.161
3	1.45	0.98–2.15	0.060
Preoperative stent	0.92	0.75–1.13	0.451
Venous resection	0.91	0.69–1.21	0.526
Blood transfusion	1.14	0.91–1.43	0.245
Hospital length of stay	0.99	0.98–1.01	0.591
Lymph node status
Negative (reference)
Positive	1.14	0.93–1.41	0.210
No. of lymph nodes resected	1.01	1.00–1.02	0.003
Margin status
Negative (reference)
Positive	1.35	1.07–1.72	0.012
Adjuvant therapy
None (reference)
Chemotherapy only	0.74	0.55–0.98	0.039
Chemoradiation	0.80	0.62–1.03	0.079