Characteristic | No infertility | History of infertility | ||
---|---|---|---|---|
No hormone treatment | Hormonal treatment onlya | COS for IVF/ICSIb | ||
(n = 34,360) | (n = 5948) | (n = 1429) | (n = 1576) | |
Absolute dense volume, cm3 | 62.8 ± 33.2 | 64.0 ± 33.7 | 64.8 ± 31.4 | 73.8 ± 41.5 |
Absolute non-dense volume, cm3 | 773 ± 466 | 805 ± 470 | 804 ± 499 | 706 ± 465 |
Percent dense volume, pp | 9.2 ± 5.2 | 9.0 ± 5.2 | 9.3 ± 5.2 | 11.4 ± 5.8 |
Age at mammography, years, % | ||||
40–44 | 20.9 | 16.4 | 22.9 | 42.5 |
45–49 | 19.1 | 17.2 | 20.4 | 28.7 |
50–54 | 18.3 | 17.2 | 19.9 | 18.3 |
55–59 | 13.4 | 15.1 | 15.3 | 8.3 |
60–64 | 14.0 | 16.6 | 12.5 | 1.8 |
65–69 | 14.4 | 17.5 | 9.0 | 0.3 |
BMI, kg/m2, % | ||||
<18.5 | 0.8 | 1.0 | 1.0 | 1.4 |
18.5–24.9 | 55.7 | 53.6 | 54.9 | 61.7 |
25–29.9 | 30.9 | 32.6 | 29.5 | 27.0 |
≥30 | 12.6 | 12.8 | 14.6 | 9.8 |
Age at menarche, years, % | ||||
<12 | 12.6 | 14.2 | 14.1 | 16.1 |
12–14 | 72.0 | 70.5 | 69.7 | 70.7 |
≥15–25 | 15.3 | 15.3 | 16.2 | 13.2 |
Cigarette smoking, % | ||||
Never | 48.7 | 46.0 | 50.7 | 57.4 |
Current | 11.3 | 10.8 | 9.2 | 7.2 |
Former | 40.0 | 43.2 | 40.2 | 35.3 |
Alcohol consumption, g/d, % | ||||
Non-drinker | 18.3 | 17.3 | 17.4 | 15.5 |
0.1–9.9 | 62.1 | 61.2 | 62.8 | 67.8 |
≥10 | 19.5 | 21.5 | 19.9 | 16.7 |
Education level, % | ||||
Compulsory school | 10.9 | 12.0 | 6.9 | 2.5 |
Upper secondary school | 31.6 | 31.1 | 32.4 | 25.5 |
University | 54.3 | 53.1 | 56.8 | 69.2 |
Other | 3.2 | 3.9 | 3.9 | 2.8 |
Family history of breast cancer, % | 12.5 | 12.7 | 13.6 | 12.1 |
Parity, % | ||||
Nulliparous | 10.8 | 17.3 | 14.4 | 31.3 |
One birth | 12.3 | 19.3 | 21.6 | 27.5 |
Two births | 50.4 | 44.2 | 43.5 | 31.5 |
Three or more births | 26.6 | 19.2 | 20.4 | 9.7 |
Premenopausal, % | 46.1 | 39.3 | 50.2 | 73.9 |