Table 1.

Clinical Characteristics

Variables	Total (N=475)	%	BCD* (N=403)	%	HRBCC† (N=72)	%
Age (years)	median 52 (22–87)		median 53 (22–87)		median 51 (24–77)
Body mass index (kg/m2)
Underweight + Normal (<25)	253	53	204	51	49	68
Overweight + Obese (≥25)	222	47	199	49	23	32
Family history of breast cancer
No	274	58	248	62	26	36
Yes	201	42	155	38	46	64
History of atypical hyperplasia
No	433	91	387	96	46	64
Yes	42	9	16	4	26	36
History of lobular carcinoma in situ
No	451	95	394	98	57	79
Yes	24	5	9	2	15	21
Mammographic breast density
Entirely Fatty	32	7	29	7	3	4
Scattered Fibroglandular Tissue	137	29	120	30	17	24
Heterogeneously Dense	223	47	196	49	27	37
Extremely Dense	83	17	58	14	25	35
Background parenchymal enhancement
Minimal	73	15	50	12	23	32
Mild	210	44	193	48	17	24
Moderate	128	27	107	27	21	29
Marked	64	14	53	13	11	15
Fibroglandular tissue
Entirely Fatty	108	23	94	23	14	19
Scattered Fibroglandular Tissue	141	30	129	32	12	17
Heterogeneously Dense	133	28	106	26	27	38
Extremely Dense	93	19	74	19	19	26

^*Breast Cancer Database

^†High Risk Breast Cancer Consortium