Table 1.

Clinical characteristics.

Variables	TNBC (N = 190, 10%)	%	Non-TNBC (N = 1774, 90%)	%	p value
Median age, in years	59 (25–92)		59 (22–95)		0.52
Race
African American	31	16	147	8	0.0003
Asian	23	12	152	9
White	122	64	1363	77
Hispanic	11	6	103	6
Other	3	2	9	1
AH
No	188	99	1741	98	0.57
Yes	2	1	33	2
LCIS
No	190	100	1751	99	0.16
Yes	0	0	23	1
Previous history of breast cancer
No	156	82	1605	90	0.0003
Yes	34	18	169	10
Family history of breast cancer
No	144	76	1352	76	0.90
Yes	46	24	442	24
BRCA1
Negative	65	82	481	97	<0.0001
Positive	14	18	17	3
Unknown/not tested	111	—	1276	—
BRCA2
Negative	68	86	480	96	0.0007
Positive	11	14	18	4
Unknown/not tested	111	—	1276	—
Chemoprevention
No	179	94	1695	96	0.40
Yes	11	6	79	4