Table 2.

Adjusted Overall Survival Model (N=7,025).

	HR (95% CI)	P-Value	Overall P-Value
Axillary Surgery Group			<0.001
SLNB (1–5 LNs)	REF
ALND (10+ LNs)	0.678 (0.556 – 0.828)	<0.001
Age (Years)	1.011 (1.005 – 1.017)	<0.001	<0.001
Race			0.002
White	REF
Black	1.291 (1.108 – 1.505)	0.001
Other	0.74 (0.48 – 1.141)	0.17
Charlson/Deyo Score			<0.001
0	REF
1	1.329 (1.127 – 1.567)	<.0001
≥2	1.561 (1.173 – 2.077)	0.002
Income Level			0.03
≥$35,000	REF
<$35,000	1.176 (1.016 – 1.362)	0.03
Insurance Type			<0.001
Private	REF
Government	1.347 (1.17 – 1.551)	<0.001
Not Insured	1.303 (0.967 – 1.755)	0.08
Education Level			0.49
>80% High School Graduation Rate	REF
≤80% High School Graduation Rate	0.949 (0.818 – 1.1)	0.49
ER Status			0.25
Positive	0.88 (0.706 – 1.096)	0.25
Negative	REF
PR Status			<.001
Positive	0.562 (0.472 – 0.669)	<0.001
Negative	REF
HER2 Status*			<0.001
Positive	0.585 (0.499 – 0.686)	<0.001
Negative	REF
Clinical N-Stage			0.08
2	REF
3	1.137 (0.984 – 1.314)	0.08
Clinical T-Stage			<0.001
1	REF
2	1.222 (1.028 – 1.453)	0.02
3	1.547 (1.276 – 1.875)	<0.001
Grade			<0.001
1	REF
2	1.02 (0.738 – 1.409)	0.91
3	1.613 (1.168 – 2.228)	0.004
Histology			0.20
Invasive Ductal	REF
Invasive Lobular	0.856 (0.684 – 1.072)	0.18
Other Invasive	0.719 (0.433 – 1.193)	0.202
Surgery Type			0.002
Mastectomy	REF
Lumpectomy	0.787 (0.675 – 0.916)	0.002
# Positive LNs	1.04 (1.031 −1.048)	<0.001	<0.001
Chemotherapy Use	0.48 (0.404 – 0.571)	<0.001	<0.001
Radiation Use	0.676 (0.586 – 0.779)	<0.001	<0.001
Endocrine Therapy Use	0.637 (0.522 – 0.778)	<0.001	<0.001

^*HER2 status is frequently missing in this database, hence the highly reduced sample size included in this model.