Table 2. Univariate and multivariate analyses of cancer special survival (CSS) and overall survival (OS) after propensity score matching (N = 188).

Variables	CSS			OS
	Univariate analysis	Multivariate analysis		Univariate analysis	Multivariate analysis
	P-value	HR (95% CI)	P-value	P-value	HR (95% CI)	P-value
Age	0.407		NI	0.491		NI
<40
40–60
>60
Race	0.002		0.029	0.003		0.046
White		Reference			Reference
Black		2.251 (1.186, 4.271)	0.013		2.076 (1.102, 3.912)	0.024
Other		0.781 (0.270, 2.258)	0.648		0.725 (0.252.2.084)	0.551
Marital status	0.204		NI	0.138		NI
Married
Unmarried
Unknown						NI
Grade	0.108		NI	0.078
Grade I/II
Grade III/IV
Unknown
AJCC stage	<0.001		<0.001	<0.001		<0.001
IIIA		Reference			Reference
IIIB		1.465 (0.645, 3.328)	0.361		1.541 (0.702, 3.380)	0.281
IV		4.837(2.548, 9.180)	<0.001		4.475(2.387, 8.389)	<0.001
Breast Subtype	<0.001		<0.001	<0.001		<0.001
Her2-/HoR+		Reference			Reference
Her2+/HoR-		0.870 (0.330, 2.294)	0.778		0.820 (0.314, 2.143)	0.686
Her2+/HoR+		0.244 (0.070, 0.857)	0.028		0.225 (0.065, 0.785)	0.019
Triple Negative		3.387 (1.697, 6.762)	0.001		3.188 (1.630, 6.235)	0.001
Unknown		1.988 (0.655, 6.036)	0.225		1.897 (0.633, 5.685)	0.253
Surgery	0.843		0.307	0.738		0.254
Simple Mastectomy		Reference			Reference
Radical mastectomy		1.493 (0.692, 3.222)			1.556 (0.728, 3.323)
Chemotherapy	0.459		0.637	0.438		0.549
No/unknown		Reference			Reference
Yes		1.641 (0.209, 12.882)			1.875 (0.241, 14.607)
PMRT	0.013		0.030	0.006		0.013
No		Reference			Reference
Yes		0.519 (0.287, 0.939)			0.480 (0.269, 0.859)

Notes.

Abbreviation

HoR

Hormone receptor

CSS

cancerspecific survival

OS

overall survival

NI

not included in the multivariate survival analysis

PMRT

post mastectomy radiotherapy