Table 3.

Factors associated with OS and BCSS in a Cox proportional hazards model of patients diagnosed with early breast cancer in 2018,2019, and 2020.

Characteristics		OS				BCSS
		95% CI				95% CI
		HR	Low	High	P	HR	Low	High	P
Race
	White	Reference				Reference
	Black	1.312	1.197	1.438	<0.001	1.174	1.029	1.339	0.017
	Other	0.696	0.611	0.793	<0.001	0.743	0.617	0.894	0.002
Age
	<50	Reference				Reference
	50≤;<70	1.531	1.363	1.72	<0.001	1.179	1.024	1.358	0.022
	≥70	4.048	3.606	4.544	<0.001	2.37	2.045	2.748	<0.001
Grade
	I	Reference				Reference
	II	1.161	1.042	1.293	0.007	1.768	1.385	2.257	<0.001
	III	1.595	1.412	1.802	<0.001	2.974	2.313	3.824	<0.001
Subtype
	HR+/Her2-	Reference				Reference
	HR+/Her2+	0.987	0.866	1.126	0.848	0.781	0.634	0.962	0.02
	HR-/Her2+	1.152	0.984	1.348	0.078	1.013	0.816	1.256	0.91
	HR-/Her2-	1.444	1.312	1.59	<0.001	1.555	1.371	1.764	<0.001
Stage
	I	Reference				Reference
	II	2.472	2.241	2.727	<0.001	4.366	3.714	5.133	<0.001
	III	7.348	6.683	8.078	<0.001	17.644	15.16	20.536	<0.001
Radiation
	No	Reference				Reference
	Yes	0.341	0.317	0.367	<0.001	0.366	0.329	0.407	<0.001
Chemotherapy
	No	Reference				Reference
	Yes	0.773	0.708	0.844	<0.001	0.935	0.822	1.063	0.305
Year of diagnosis
	2020	Reference				Reference
	2018	0.861	0.743	0.996	0.045	1.001	0.791	1.267	0.994
	2019	0.887	0.766	1.026	0.105	0.998	0.789	1.262	0.985