From: Mammographic density as a predictor of breast cancer survival: the Multiethnic Cohort
Characteristic | Native Hawaiian | Japanese | Caucasian | Other | All |
---|---|---|---|---|---|
Number of cases | 79 | 292 | 195 | 41 | 607 |
Number of deaths | 20 | 51 | 54 | 2 | 127 |
Breast cancer | 7 | 10 | 9 | 1 | 27 |
All other causes | 13 | 41 | 45 | 1 | 100 |
Stage at diagnosis, number | |||||
In situ | 10 | 68 | 38 | 9 | 125 |
Local | 50 | 175 | 131 | 24 | 380 |
Advanced | 19 | 48 | 25 | 8 | 100 |
Unknown | 0 | 1 | 1 | 0 | 2 |
Number of second breast cancers | 12 | 29 | 25 | 5 | 71 |
Mean age at mammograms, years | 57.8 | 60.2 | 60.4 | 55.5 | 59.6 |
Age at diagnosis, years | 61.7 | 63.9 | 63.9 | 59.3 | 63.3 |
Time from first mammogram to diagnosis, yearsa | 6.3 | 6.7 | 6.7 | 6.4 | 6.3 |
Years of follow-up | 12.4 | 13.2 | 12.6 | 13.8 | 12.9 |
Total breast area, cm2 | 139.4 | 92.0 | 136.7 | 98.0 | 112.9 |
Dense breast area, cm2 | 37.7 | 32.0 | 41.6 | 41.4 | 36.5 |
Percent density | 30.1 | 38.2 | 36.2 | 45.1 | 37.0 |
Body mass index, kg/m2 | 28.2 | 24.3 | 25.2 | 24.4 | 25.1 |
Family history, percentageb | 25.3 | 16.1 | 14.9 | 19.5 | 17.1 |
Age at menarche, years | 12.9 | 12.9 | 13.0 | 13.8 | 13.0 |
Parous, percentage | 87.3 | 84.3 | 82.1 | 80.5 | 83.7 |
At least 30 years old at first birth, percentage | 3.8 | 10.3 | 8.7 | 14.6 | 9.2 |
Number of children | 3.1 | 2.2 | 2.2 | 2.3 | 2.3 |
Postmenopausal, percentage | 80.0 | 79.5 | 85.1 | 63.4 | 79.7 |
Use of any HRT, percentagec | 48.1 | 24.3 | 34.9 | 31.7 | 31.3 |
ERT use, percentage | 24.1 | 44.5 | 38.0 | 19.5 | 38.1 |
EPRT use, percentage | 27.9 | 31.2 | 27.2 | 48.8 | 30.6 |