Table 3 Percentage of mammographic density of the study subjects by categories of mammographic density based on the Breast Imaging Reporting and Data System (BIRADS) of the American College of Radiology
ACR category | N | Percent density | |
|---|---|---|---|
Mean | Median | ||
Mostly fatty (ACR I) | 58 | 3 | 1 |
Fibroglandular (ACR II) | 282 | 11 | 8 |
Heterogeneously dense (ACR III) | 283 | 33 | 31 |
Dense (ACR IV) | 65 | 52 | 50 |
Missing evaluations | 7 | 22 | 13 |
Overall | 695 | 23 | 18 |