TABLE 2.

Selected variables by multivariate Cox stepwise regression analysis.

	Multivariate analysis
Variable	HR	95% CI	p-Value
Age of diagnosis	1.031	1.028–1.033	<0.0001
RNE	0.997	0.995–0.998	<0.0001
RNP	1.003	1.002–1.004	<0.0001
Sex
Male	Reference
Female	1.237	1.154–1.326	<0.0001
Race
White	Reference
Black	1.243	1.127–1.371	<0.0001
Other	0.977	0.884–1.08	0.6478
Marital status
Single	Reference
Married	0.697	0.644–0.755	<0.0001
DSW	0.998	0.912–1.092	0.9641
AJCC stage
I	Reference
II	1.429	1.22–1.674	<0.0001
III	1.937	1.616–2.321	<0.0001
IV	2.095	1.734–2.532	<0.0001
Summary of stage
Localized	Reference
Regional	1.163	0.995–1.359	0.0572
Distant	2.343	1.968–2.79	<0.0001
Radiation
Yes	Reference
No/unknown	1.702	1.554–1.865	<0.0001
Chemotherapy
Yes	Reference
No/unknown	1.268	1.167–1.379	<0.0001
Income
<$35,000, $35,000–$44,999	Reference
$45,000–$59,999	0.891	0.791–1.004	0.0573
$60,000–$74,999	0.823	0.736–0.919	0.0006
$75,000+	0.738	0.655–0.831	<0.0001
Surgery
Yes	Reference
No/unknown	1.428	1.317–1.547	<0.0001