Table 2.
Means (SD's) of breast composition measures using Quantra volumetric breast density measurement (Hologic), by age and diagnostic group, in 6930 assessment cases, including 1148 cancers in the UK Breast Screening Programme.
| Age (years) | Breast composition measure | Mean (SD) for population |
|||
|---|---|---|---|---|---|
| Cancers | Assessment non-cancers |
Family history non-cancers |
All non-cancers |
||
| <50 | Breast volume (cm3) | 1118 (723) | 1075 (696) | 1088 (681) | 1085 (685) |
| Dense volume (cm3) | 143 (99) | 142 (128) | 137 (99) | 138 (107) | |
| % Density | 14 (7) | 14 (7) | 14 (7) | 14 (7) | |
| No. of subjects | 29 | 313 | 938 | 1251 | |
| 50–59 | Breast volume (cm3) | 1195 (670) | 1079 (636) | 1044 (602) | 1078 (636) |
| Dense volume (cm3) | 131 (93) | 114 (99) | 111 (82) | 114 (88) | |
| % Density | 12 (6) | 11 (6) | 13 (9) | 11 (6) | |
| No. of subjects | 459 | 3088 | 43 | 3131 | |
| ≥60 | Breast volume (cm3) | 1126 (582) | 1054 (570) | 612 (121) | 1052 (570) |
| Dense volume (cm3) | 104 (71) | 97 (76) | 57 (41) | 97 (76) | |
| % Density | 9 (5) | 9 (5) | 9 (5) | 9 (5) | |
| No. of subjects | 660 | 1397 | 3 | 1400 | |