Combining quantitative and qualitative breast density measures to assess breast cancer risk

Breast Cancer Research

Table 5 Breast Cancer Surveillance Consortium 5-year breast cancer risk by Breast Imaging Reporting and Data System breast density with the addition of dense breast volume

	BI-RADS breast density a^a	BI-RADS breast density b^a	BI-RADS breast density c^a	BI-RADS breast density d^a
	5-year risk, mean (SD)	5-year risk, mean (SD)	5-year risk, mean (SD)	5-year risk, mean (SD)
Dense breast volume,^b ml
Quartile 1: ≤ 35.9	0.9 (0.5)	1.6 (0.9)	1.8 (1.1)	1.5 (0.8)
Quartile 2: 36.0–50.0	1.1 (0.6)	1.7 (0.9)	2.1 (1.3)	2.3 (1.7)
Quartile 3: 50.1–70.0	1.0 (0.7)	1.8 (1.1)	2.2 (1.3)	2.4 (1.6)
Quartile 4: 70.1+	1.2 (0.7)	1.9 (1.2)	2.5 (1.5)	2.5 (1.6)
Mean BCSC 5-year risk	1.0 (0.6)	1.7 (1.0)	2.0 (1.2)	2.0 (1.4)

BCSC Breast Cancer Surveillance Consortium, BI-RADS Breast Imaging Reporting and Data System
^aBI-RADS breast density: a = almost entirely fat, b = scattered fibroglandular densities, c = heterogeneously dense, d = extremely dense
^bMeasured with Volpara software

ISSN: 1465-542X