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Table 1

From: PB.21: Relationship between volumetric breast density and socioeconomic status

Volparaâ„¢ density grade (VDG)

Volparaâ„¢ breast density (%)

Mean IMD

Number (%) of women

1

<4.5

28.8

1923 (30.0%)

2

4.5 to 7.5

26.2

2765 (43.2%)

3

7.6 to 15.5

24.4

1505 (23.5%)

4

>15.5

21.4

205 (3.2%)