Table 1.

Clinical and healthcare characteristics of women with breast cancer ¹, by race/ethnicity

	Non-Hispanic White N=4487		Hispanic N=2,263		African American N=1,972		Asian American N=1,644		Total N=10,366
	N	%	N	%	N	%	N	%	N	%
Study 2
AABCS	0	0	0	0	0	0	817	50	817	8
CARE	428	10	61	3	374	19	0	0	863	8
CTS	2,701	60	79	3	62	3	85	5	2,927	28
MEC	301	7	467	21	558	28	116	7	1,442	14
NC-BCFR	568	13	684	30	530	27	626	38	2,408	23
SFBCS	489	11	972	43	448	23	0	0	1,909	18
AJCC stage at diagnosis
I	2,365	53	983	43	789	40	750	46	4,887	47
II	1,672	37	987	44	920	47	749	46	4,328	42
III	261	6	215	10	144	7	103	6	723	7
IV	85	2	35	2	53	3	23	1	196	2
Unknown	104	2	43	2	66	3	19	1	232	2
Histology
Ductal	3,214	72	1,754	78	1,519	77	1,281	78	7,768	75
Lobular	899	20	322	14	261	13	214	13	1,696	16
Other	374	8	187	8	192	10	149	9	902	9
Grade
I	1,040	23	363	16	276	14	240	15	1,919	19
II	1,798	40	845	37	634	32	682	41	3,959	38
III or IV	1,279	29	875	39	882	45	618	38	3,654	35
Unknown	370	8	180	8	180	9	104	6	834	8
Nodal involvement
No nodes	3,007	67	1,352	60	1,171	59	1,006	61	6,536	63
Positive nodes	1,363	30	862	38	731	37	608	37	3,564	34
Unknown	117	3	49	2	70	4	30	2	266	3
Tumor size (cm)
<1	897	20	333	15	229	12	257	16	1,713	17
1-<5	3,146	70	1,670	74	1,480	75	1,221	74	7,517	73
≥5	274	6	187	8	185	9	135	8	781	8
Unknown	173	4	73	3	78	4	31	2	355	3
Had 1 or more subsequent cancers
No	3,677	82	1,977	87	1,650	84	1,387	84	8,691	84
Yes	810	18	286	13	322	16	257	16	1,675	16
Surgery 3
No surgery	58	1	28	1	64	3	16	1	166	2
Mastectomy	1,652	37	941	42	753	38	840	51	4,186	40
Breast-conserving surgery	2,772	62	1,288	57	1,152	58	786	48	5,998	58
Other	5	<1	6	<1	3	<1	2	<1	16	<1
Radiation therapy 3
No	1,881	42	952	42	963	49	869	53	4,665	45
Yes	2,606	58	1,311	58	1,009	51	775	47	5,701	55
Chemotherapy 3
No	2,659	59	991	44	1,001	51	745	45	5,396	52
Yes	1,761	39	1,246	55	939	48	872	53	4,818	46
Unknown	67	1	26	1	32	2	27	2	152	1
Hospital type
NCI Cancer Center	249	6	130	6	87	4	123	7	589	6
ACOS Cancer Program	2,040	45	828	37	484	25	683	42	4,035	39
Other	2,198	49	1,305	58	1,401	71	838	51	5,742	55

Abbreviations: ACOS, American College of Surgeons; AJCC, American Joint Committee on Cancer; ER, estrogen receptor status; PR, progesterone receptor; NCI, National Cancer Institute.

¹Analysis based on 8,163 women with ER/PR+ breast cancer and 2,203 women with ER−/PR− breast cancer.

²AABCS, Asian American Breast Cancer Study; CARE, Women’s Contraceptive and Reproductive Experiences Study; CTS, California Teachers Study; MEC, Multiethnic Cohort Study; NC-BCFR, Northern California Breast Cancer Family Registry; SFBCS, San Francisco Bay Area Breast Cancer Study.

³Receipt of first-course treatment.