Table 2.

Univariate and multivariate survival analysis of CSS in inflammatory breast cancer patients

Characteristic	Univariate analysis		Multivariate analysis
	Log-rank χ2	P value	HR	95% CI	P value
Marital status	24.239	< 0.001
Married			Reference
Unmarried			1.188	1.033–1.367	0.016
Age	2.685	0.101			NI
≤ 56
>56
Race	47.365	< 0.001			< 0.001
White			Reference
Black			1.663	1.398–1.979	< 0.001
Other*			0.781	0.551–1.106	0.164
Grade	14.508	0.001			0.041
Grade I/II			Reference
Grade III/IV			1.138	0.937–1.381	0.191
Unknown			0.914	0.729–1.147	0.437
AJCC stage	280.068	< 0.001			< 0.001
IIIA			Reference
IIIB			1.479	1.209–1.810	< 0.001
IV			2.624	2.212–3.113	< 0.001
HOR	68.344	< 0.001			< 0.001
Positive			Reference
Negative			1.809	1.550–2.111	< 0.001
Unknown			2.185	1.728–2.763	< 0.001
HER-2	7.187	0.028			0.006
Positive			Reference
Negative			2.208	1.114–4.373	0.023
Unknown			2.588	1.420–4.715	0.002
Surgery	318.410	< 0.001
No surgery			Reference
Partial mastectomy			0.493	0.350–0.695	< 0.001
Simple mastectomy			0.495	0.375–0.653	< 0.001
Radical mastectomy			0.484	0.401–0.585	< 0.001
Chemotherapy	64.214	< 0.001
No/unknown			Reference
Yes			0.563	0.462–0.687	< 0.001
Radiotherapy	47.991	< 0.001
No/unknown			Reference
Yes			0.890	0.765–1.036	0.133

SEER 2004–2010 (n = 1342)

HoR hormone receptor

*Other includes American Indian/Alaska native, Asian/Pacific Islander, and unknown