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Table 2 Frequency distribution of volumetric density within Breast Imaging Reporting and Data System breast density categories

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

Dense breast volume,b ml

Control subjects

Cases

BI-RADS breast densitya

BI-RADS breast densitya

a

n = 731

%

b

n = 1557

%

c

n = 1115

%

d

n = 283

%

a

n = 233

%

b

n = 668

%

c

n = 600

%

d

n = 219

%

Quartile 1: ≤ 35.9

30.5

28.0

15.2

9.9

26.2

24.4

9.7

5.9

Quartile 2: 36.0–50.0

32.1

28.5

19.3

15.2

30.0

27.7

17.3

9.1

Quartile 3: 50.1–70.0

27.5

26.3

26.3

20.8

29.6

26.9

25.7

23.7

Quartile 4: 70.1+

9.8

17.2

39.3

54.1

14.2

21.0

47.3

61.2

  1. BI-RADS Breast Imaging Reporting and Data System
  2. aBI-RADS breast density: a = almost entirely fat, b = scattered fibroglandular densities, c = heterogeneously dense, d = extremely dense
  3. bMeasured with Volpara software
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Breast Cancer Research

ISSN: 1465-542X

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