| UO tumor group | UI tumor group | LO tumor group | LI tumor group |
---|---|---|---|---|
Breast Area (cm2) | ||||
 Upper-Outer | 39 ± 16 | 35 ± 17 | 33 ± 5 | 32 ± 11 |
 Upper-Inner | 35 ± 14 | 34 ± 17 | 31 ± 6 | 30 ± 10 |
 Lower-Outer | 25 ± 11 | 23 ± 11 | 24 ± 5 | 21 ± 7 |
 Lower-Inner | 22 ± 9 | 23 ± 10 | 22 ± 5 | 18 ± 6 |
Dense Area (cm2) | ||||
 Upper-Outer | 7.4 ± 3.2 | 6.4 ± 3.2 | 7.4 ± 1.8 | 6.4 ± 1.9 |
 Upper-Inner | 6.1 ± 2.3 | 6.0 ± 3.1 | 6.5 ± 2.1 | 5.7 ± 1.7 |
 Lower-Outer | 5.5 ± 2.6 | 5.2 ± 2.5 | 6.1 ± 2.1 | 4.5 ± 1.3 |
 Lower-Inner | 4.2 ± 2.2 | 4.8 ± 2.3 | 5.2 ± 2.2 | 3.8 ± 1.4 |
Percent Density (%) | ||||
 Upper-Outer | 19.9 ± 6.0 | 18.9 ± 7.0 | 22.7 ± 5.8 | 20.5 ± 4.3 |
 Upper-Inner | 18.1 ± 5.4 | 17.9 ± 6.1 | 20.9 ± 6.6 | 19.3 ± 2.5 |
 Lower-Outer | 22.7 ± 8.3 | 22.8 ± 7.0 | 25.5 ± 6.9 | 22.6 ± 5.0 |
 Lower-Inner | 19.9 ± 8.2 | 21.5 ± 6.3 | 22.9 ± 6.2 | 20.9 ± 4.7 |