Table 2.

Multivariate Cox Survival Model

Characteristic	HR7	95% Cl’	p-value
Class			< 0.001
Adjuvant	—	—
Neoadjuvant	0.76	0.46, 1.26
No_Chemo	1.87	1.45, 2.42
Age	1.01	1.00, 1.02	0.007
Sex			0.29
Male	–	–
Female	0.87	0.68, 1.12
Charlson-Deyo	1.04	0.88, 1.22	0.66
Tumor Size	1.01	1.01, 1.01	< 0.001
Regional Lymphadenectomy			0.10
No	–	–
Yes	0.75	0.53, 1.05
Regional Nodes Examined	0.99	0.97, 1.02	0.64
Regional Nodes Positive	1.13	1.05, 1.21	0.002
Margins			< 0.001
R0	–	–
Rl	2.07	1.54, 2.77
R2	4.05	1.91, 8.57

⁷HR = Hazard Ratio, CI = Confidence Interval