Table 2.

Univariate and multivariate Cox proportional hazards models for overall survival

	Univariate analysis			Multivariate analysis
	HR	95% CI	p Value	HR	95% CI	p Value
Age (per 10 years)	1.09	0.99 to 1.03	0.46	1.19	0.92 to 1.54	0.19
Sex
Male	1			1
Female	1.17	0.61  to 2.21	0.64	1.30	0.61 to 2.78	0.50
Race			0.59			0.40
White	1			1
Asian	0.91	0.22  to  3.77	0.90	0.91	0.18 to  4.49	0.90
Black	2.21	0.53 to  9.17	0.27	3.76	0.80 to 17.57	0.09
Histological type
Adenocarcinoma	1			1
Squamous cell	1.63	0.92 to 2.88	0.10	1.14	0.53 to  2.43	0.74
Pathological stage			0.004			0.001
I	1			1
II	2.42	1.08  to  5.38	0.03	2.65	1.13  to  6.22	0.03
III	4.01	1.88  to  8.55	<0.0005	5.14	2.23 to 11.82	<0.0005
IV	2.14	0.27  to  16.94	0.47	0.94	0.11  to  8.10	0.96
Neoadjuvant therapy
No	1			1
Yes	1.78	1.02 to  3.11	0.04	2.65	1.38 to 5.09	0.003
Percent (per 10%)	1.04	0.95  to 1.14	0.42	1.13	1.01 to 1.26	0.03