Table 1.
Characteristics of women at the digital screening mammography by age group
| Characteristic | Age Group
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 65–69 (N=110,096) | 70–74 (N=78,985) | 75–79 (N=57,488) | 80–84 (N=33,950) | 85+ (N=15,977) | Total (N=296,496) | |||||||
| N | % | N | % | N | % | N | % | N | % | N | % | |
| Race/ethnicity | ||||||||||||
| White | 76,956 | 75.3 | 53,612 | 73.8 | 38,960 | 75.3 | 23,123 | 78.7 | 10,648 | 81.3 | 203,299 | 75.6 |
| Black | 6,735 | 6.6 | 4,926 | 6.8 | 3,403 | 6.6 | 1,661 | 5.7 | 779 | 6.0 | 17,504 | 6.5 |
| Asian or Pacific Islander | 13,716 | 13.4 | 10,889 | 15.0 | 7,521 | 14.5 | 3,676 | 12.5 | 1,291 | 9.9 | 37,093 | 13.8 |
| American Indian | 190 | 0.2 | 139 | 0.2 | 62 | 0.1 | 37 | 0.1 | 13 | 0.1 | 441 | 0.2 |
| Hispanic | 3,283 | 3.2 | 2,186 | 3.0 | 1,323 | 2.6 | 618 | 2.1 | 229 | 1.8 | 7,639 | 2.8 |
| Other or mixed | 1,379 | 1.4 | 873 | 1.2 | 478 | 0.9 | 268 | 0.9 | 132 | 1.0 | 3,130 | 1.2 |
| missing | 7,837 | 7.1 | 6,360 | 8.1 | 5,741 | 10.0 | 4,567 | 13.5 | 2,885 | 18.1 | 27,390 | 9.2 |
|
| ||||||||||||
| Family history of breast cancer | ||||||||||||
| No | 90,449 | 82.9 | 64,379 | 82.2 | 46,387 | 81.2 | 27,001 | 80.0 | 12,476 | 78.6 | 240,692 | 81.8 |
| Yes | 18,724 | 17.2 | 13,916 | 17.8 | 10,736 | 18.8 | 6,753 | 20.0 | 3,394 | 21.4 | 53,523 | 18.2 |
| missing | 923 | 0.8 | 690 | 0.9 | 365 | 0.6 | 196 | 0.6 | 107 | 0.7 | 2,281 | 0.8 |
|
| ||||||||||||
| BI-RADS breast density* | ||||||||||||
| Almost entirely fat | 15,253 | 16.4 | 11,133 | 16.7 | 8,025 | 16.5 | 4,714 | 16.2 | 2,053 | 15.1 | 41,178 | 16.4 |
| Scattered fibroglandular | 46,970 | 50.4 | 35,053 | 52.5 | 25,830 | 53.2 | 15,900 | 54.7 | 7,355 | 54.1 | 131,108 | 52.2 |
| Heterogeneously dense | 27,988 | 30.0 | 18,885 | 28.3 | 13,402 | 27.6 | 7,737 | 26.6 | 3,731 | 27.5 | 71,743 | 28.6 |
| Extremely dense | 3,057 | 3.3 | 1,649 | 2.5 | 1,259 | 2.6 | 717 | 2.5 | 455 | 3.4 | 7,137 | 2.8 |
| missing | 16,828 | 15.3 | 12,265 | 15.5 | 8,972 | 15.6 | 4,882 | 14.4 | 2,383 | 14.9 | 45,330 | 15.3 |
|
| ||||||||||||
| History of breast procedure | ||||||||||||
| No | 75,975 | 72.8 | 54,148 | 72.6 | 39,928 | 73.5 | 23,678 | 73.9 | 11,370 | 75.4 | 205,099 | 73.1 |
| Yes | 28,395 | 27.2 | 20,466 | 27.4 | 14,436 | 26.6 | 8,362 | 26.1 | 3,718 | 24.6 | 75,377 | 26.9 |
| missing | 5,726 | 5.2 | 4,371 | 5.5 | 3,124 | 5.4 | 1,910 | 5.6 | 889 | 5.6 | 16,020 | 5.4 |
|
| ||||||||||||
| Current HT use | ||||||||||||
| No | 81,975 | 87.6 | 58,672 | 89.4 | 43,620 | 91.2 | 26,099 | 91.7 | 12,422 | 92.4 | 222,788 | 89.5 |
| Yes | 11,575 | 12.4 | 6,927 | 10.6 | 4,209 | 8.8 | 2,373 | 8.3 | 1,021 | 7.6 | 26,105 | 10.5 |
| missing | 16,546 | 15.0 | 13,386 | 17.0 | 9,659 | 16.8 | 5,478 | 16.1 | 2,534 | 15.9 | 47,603 | 16.1 |
|
| ||||||||||||
| Time since previous examination, months | ||||||||||||
| 9–17 | 79,214 | 74.1 | 58,904 | 76.3 | 43,366 | 76.9 | 25,237 | 75.9 | 11,649 | 74.7 | 218,370 | 75.5 |
| 18–29 | 18,110 | 16.9 | 11,705 | 15.2 | 8,138 | 14.4 | 4,820 | 14.5 | 2,201 | 14.1 | 44,974 | 15.5 |
| 30–41 | 4,670 | 4.4 | 3,496 | 4.5 | 2,536 | 4.5 | 1,564 | 4.7 | 811 | 5.2 | 13,077 | 4.5 |
| 42+ | 4,922 | 4.6 | 3,097 | 4.0 | 2,348 | 4.2 | 1,620 | 4.9 | 944 | 6.1 | 12,931 | 4.5 |
| missing | 3,180 | 2.9 | 1,783 | 2.3 | 1,100 | 1.9 | 709 | 2.1 | 372 | 2.3 | 7,144 | 2.4 |
*
BI-RADS density = Breast Imaging Reporting and Data System breast density categories defined as: 1=almost entirely fatty, 2=scattered fibroglandular densities 3=heterogeneously dense and 4=extremely dense