Table 3.
Means (SD's) of visually assessed percent density, by age and diagnostic group, in 6969 assessment cases, including 1153 cancers in the UK Breast Screening Programme.
| Age (years) | Quantity | Mean (SD) for population |
|||
|---|---|---|---|---|---|
| Cancers | Assessment non-cancers |
Family history non-cancers |
All non-cancers |
||
| <50 | % Density | 46 (19) | 43 (18) | 42 (22) | 42 (21) |
| No. of subjects | 29 | 314 | 915 | 1229 | |
| 50–59 | % Density | 42 (22) | 40 (21) | 37 (18) | 40 (21) |
| No. of subjects | 461 | 3067 | 41 | 3108 | |
| ≥60 | % Density | 33 (19) | 35 (20) | 40 (22) | 35 (20) |
| No. of subjects | 663 | 1432 | 47 | 1479 | |