Table 3.

Multivariate prognostic analysis after propensity score matching.

Variables	BCSS			OS
	HR	95%CI	P	HR	95%CI	P
Age (years)
70-74	1			1
75-79	1.539	1.536-1.164	0.002	1.600	1.449-1.767	<0.001
80-84	1.859	1.420-2.427	<0.001	2.436	2.218-2.675	<0.001
≥85	3.138	2.363-4.166	<0.001	4.223	3.819-4.669	<0.001
Race
Non-Hispanic White	1			1
Non-Hispanic Black	0.966	0.657-1.419	0.859	1.008	0.883-1.152	0.901
Hispanic (All Races)	0.925	0.630-1.359	0.692	0.897	0.785-1.026	0.113
Other	0.589	0.357-0.973	0.039	0.680	0.580-0.796	<0.001
Histology
Invasive ductal carcinoma	1			1
Invasive lobular carcinoma	1.184	0.886-1.583	0.253	1.010	0.908-1.122	0.861
Other	0.894	0.620-1.289	0.548	1.072	0.962-1.195	0.209
Grade
Well differentiated	1			1
Moderately differentiated	1.298	1.041-1.618	0.020	1.063	0.994-1.137	0.076
Poorly/undifferentiated	2.903	2.227-3.785	<0.001	1.378	1.243-1.527	<0.001
Tumor stage
T1	1			1
T2	2.772	2.271-3.385	<0.001	1.581	1.462-1.710	<0.001
PR status
Negative	1			1
Positve	0.642	0.506-0.815	<0.001	0.942	0.855-1.036	0.218
Chemotherapy
No	1			1
Yes	1.180	0.689-2.018	0.547	0.822	0.619-1.092	0.176
RT
No	1			1
Yes	0.562	0.506-0.815	<0.001	0.612	0.575-0.652	<0.001