Table 1 Clinical demographics for mammographic screening examinations
Characteristic | 2004–2009 | 2010–2020 | ||||||
|---|---|---|---|---|---|---|---|---|
No | % | No. with SDC | % | No | % | No. with SDC | % | |
No. of women screened | 602,885 | 3452 | 3,062,193 | 30,374 | ||||
Age at screeninga/diagnosis, y | ||||||||
40–44 | 1100 | 0.2 | 9 | 0.3 | 28,284 | 0.9 | 138 | 0.5 |
45–49 | 6815 | 1.1 | 53 | 1.5 | 1,096,190 | 35.8 | 6054 | 19.9 |
50–54 | 237,249 | 39.4 | 1165 | 33.7 | 659,752 | 21.5 | 6502 | 21.4 |
55–59 | 171,544 | 28.4 | 1032 | 29.9 | 566,360 | 18.5 | 6615 | 21.8 |
60–64 | 102,779 | 17.1 | 681 | 19.7 | 433,861 | 14.2 | 6392 | 21.0 |
65–69 | 83,398 | 13.8 | 512 | 14.8 | 277,746 | 9.1 | 4673 | 15.4 |
Family history of breast cancer | ||||||||
No | 570,496 | 94.6 | 3150 | 91.3 | 2,844,288 | 92.9 | 27,299 | 89.9 |
Yes | 32,389 | 5.4 | 302 | 8.7 | 217,905 | 7.1 | 3075 | 10.1 |
No. of screenings | 725,410 | 3452 | 7,444,459 | 30,374 | ||||
Screening service | ||||||||
Prevalence screenings | 602,885 | 83.1 | 3051 | 88.4 | 2,477,060 | 33.3 | 13,184 | 43.4 |
Subsequent screenings | 122,525 | 16.9 | 401 | 11.6 | 4,967,399 | 66.7 | 17,190 | 56.6 |
Menopausal status | ||||||||
Premenopausal | 99,316 | 13.7 | 554 | 16.0 | 2,164,086 | 29.1 | 9216 | 30.3 |
Postmenopausal | 626,094 | 86.3 | 2898 | 84.0 | 5,280,373 | 70.9 | 21,158 | 69.7 |
Breast density | ||||||||
Fatty breast | 83,970 | 11.6 | 253 | 7.3 | 310,759 | 4.2 | 749 | 2.5 |
Scattered fibroglandular density | 254,468 | 35.1 | 1098 | 31.8 | 1,655,441 | 22.2 | 6019 | 19.8 |
Heterogeneously dense | 335,543 | 46.3 | 1888 | 54.7 | 4,169,452 | 56.0 | 19,118 | 62.9 |
Extremely dense | 51,415 | 7.1 | 213 | 6.2 | 1,308,619 | 17.6 | 4486 | 14.8 |