The Impact of Locoregional Therapy in Nonmetastatic Inflammatory Breast Cancer: A Population-Based Study

Table 2

Cox proportional hazards model for overall survival and disease specific survival.

Variable	Overall survival			Disease specific survival
	Value	HR	95% CI	Value	HR	95% CI
Node status	<0.001			<0.001
N0		Referent			Referent
N1		1.26	1.13–1.39		1.50	1.31–1.73
N2		1.65	1.47–1.83		2.01	1.74–2.31
N3		2.28	2.05–2.53		2.90	2.50–3.30
Year Dx	<0.001			<0.001
1988–1999		Referent			Referent
2000–2013		0.81	0.75–0.86		0.77	0.70–0.83
Surgery	<0.001			0.004
PM		Referent			Referent
TM		0.75	0.66–0.86		0.79	0.67–0.92
Race	<0.001			<0.001
White		Referent			Referent
Black		1.49	1.37–1.63		1.60	1.43–1.75
Other		0.84	0.73–0.97		0.84	0.70–0.98
Radiation	<0.001			<0.001
No		Referent			Referent
Yes		0.64	0.60–0.69		0.7	0.65–0.80
ER status	<0.001			<0.001
Positive		Referent			Referent
Negative		1.38	1.26–1.50		1.40	1.30–1.60
Unknown		1.49	1.15–1.93		1.63	1.21–2.20
PR status	<0.001			<0.001
Positive		Referent			Referent
Negative		1.22	1.11–1.34		1.35	1.22–1.51
Unknown		0.96	0.75–1.25		0.97	0.72–1.30
Age (yrs)	<0.001			<0.001
<50		Referent
50		1.28	1.19–1.37