Table 1:

Predictors of experiencing a delay in post-mastectomy radiation therapy

	OR (95% CI)	P-Value	Overall P-Value
Group			<0.001
No Reconstruction	-REF-
Reconstruction	1.25 (1.188 – 1.314)	<0.001
Age (years)	0.995 (0.993 – 0.996)	<0.001
Race			<0.001
White	-REF-
Asian	0.804 (0.729 – 0.888)	<0.001
Black	1.215 (1.159 – 1.275)	<0.001
Other	1.122 (0.979 – 1.287)	0.10
Insurance Status			<0.001
Private	-REF-
Government	1.265 (1.214 – 1.318)	<0.001
Not Insured	1.273 (1.15 – 1.408)	<0.001
Facility Location			0.007
West	-REF-
Midwest	0.833 (0.751 – 0.925)	<0.001
Northeast	0.906 (0.806 – 1.019)	0.10
South	0.933 (0.842 – 1.033)	0.18
Facility Type			<0.001
Integrated Network	-REF-
Academic	1.055 (0.894 – 1.246)	0.52
Community	1.284 (1.096 – 1.505)	0.002
Comprehensive	1.166 (1.001 – 1.359)	0.05
Grade			0.07
1	-REF-
2	1.036 (0.981 – 1.095)	0.20
3	1.068 (1.007 – 1.133)	0.03
Clinical N			<0.001
cNX	-REF-
cN0	0.867 (0.806 – 0.932)	<0.001
cN1	0.781 (0.723 – 0.844)	<0.001
cN2	0.852 (0.784 – 0.925)	<0.001
cN3	0.712 (0.642 – 0.789)	<0.001
Clinical T			<0.001
cTX	-REF-
cT0	0.988 (0.749 – 1.302)	0.93
cT1	0.892 (0.824 – 0.965)	0.005
cT2	0.971 (0.9 – 1.048)	0.45
cT3	0.874 (0.805 – 0.948)	0.001
cT4	0.828 (0.763 – 0.898)	<0.001
CDCC Score			<0.001
0	-REF-
1	1.216 (1.158 – 1.276)	<0.001
≥ 2	1.504 (1.37 – 1.651)	<0.001
Chemotherapy Type			<0.001
No Chemotherapy	-REF-
Adjuvant Only	0.178 (0.166 – 0.19)	<0.001
Neoadjuvant	1.162 (1.084 – 1.246)	<0.001
ER			0.84
Positive	-REF-
Negative	0.995 (0.945 – 1.047)	0.84
PR Status			0.81
Positive	-REF-
Negative	1.006 (0.96 – 1.054)	0.81
Laterality			<0.001
Unilateral	-REF-
Bilateral	0.847 (0.814 – 0.881)	<0.001

^*The model has accounted the correlation of patients treated at same hospital.