Table 3. Univariable and multivariable Cox regression for overall survival.

ER: estrogen receptor HR: hazard ratio, CI: confidence interval

Table 3. Univariable and multivariable Cox regression for overall survival
	Univariable		Multivariable
	HR (95% CI)	p-value	HR (95% CI)	p-value
Age
<65	1		1
≥65	1.48 (1.17-1.88)	0.001	1.31 (0.86-2.01)	0.209
Race
White	1		-	-
Black	0.98 (0.74-1.30)	0.900	-	-
Other	0.51 (0.23-1.14)	0.101	-	-
Charlson-Deyo
0	1		1
1	1.50 (1.11-2.02)	0.008	1.35 (0.99-1.83)	0.059
≥2	2.12 (1.33-3.38)	0.002	1.78 (0.99-1.83)	0.019
Hormone Receptor Status
ER-	1		-	-
ER+	0.851 (0.62-1.18)	0.329	-	-
Unknown	1.12 (0.0.77-1.64)	0.553	-	-
Hormonal Therapy
No	1		-	-
Yes	0.77 (0.51-1.15)	0.201	-	-
Chemotherapy
No	1		1
Yes	0.71 (0.55-0.91)	0.006	0.76 (0.59-0.99)	0.041
Palliative Surgery
No	1		-	-
Yes	0.59 (0.30-1.13)	0.109	-	-
Palliative Radiation Therapy
No	1		-	-
Yes	1.50 (0.82-2.74)	0.193	-	-
Facility type
Non-academic	1		-	-
Academic	0.98 (0.76-1.26)	0.861	-	-
Region
Northeast	1		-	-
Midwest	1.21 (0.83-1.74)	0.321	-	-
South	1.09 (0.77-1.56)	0.625	-	-
West	1.04 (0.68-1.58)	0.867	-	-
Insurance
Not insured	1		1
Private insurance	0.56 (0.28-1.10)	0.091	0.47 (0.24-0.94)	0.032
Medicaid	0.37 (0.17-0.79)	0.011	0.34 (0.16-0.73)	0.006
Medicare	0.74 (0.37-1.45)	0.377	0.46 (0.21-1.01)	0.052
Other/unknown	0.41 (0.14-1.14)	0.088	0.37 (0.13-1.04)	0.060
Income
< $38,000	1		-	-
$38,000-$47,999	0.93 (0.64-1.35)	0.695	-	-
$48,000-$62,999	1.24 (0.85-1.80(	0.270	-	-
³$63,000	0.93 (0.64-1.35)	0.710	-	-
Year of diagnosis
2004-2007	1		-	-
2008-2011	1.04 (0.79-1.38)	0.772	-	-
2012-2015	0.93 (0.67-1.29)	0.657	-	-