| TAHBSOa(N = 1,778) | Intact uterus and ovaries (N = 6,913) | P-valueb | ||
---|---|---|---|---|---|
Age at diagnosis, mean (SD) | 63.5 | 6.9 | 63.2 | 6.8 | 0.08 |
Study enrollment years, % | Â | Â | Â | Â | Â |
 1992-1995 | 876 | 49.3 | 3,177 | 46.0 | 0.01 |
 1997-2001 | 527 | 29.6 | 2,071 | 30.0 | |
 2001-2004 | 172 | 9.7 | 690 | 10.0 | |
 2004-2007 | 203 | 11.4 | 975 | 14.1 | |
State, % | Â | Â | Â | Â | Â |
 WI | 1,205 | 67.8 | 4,787 | 69.2 | 0.3 |
 MA | 433 | 24.4 | 1,568 | 22.7 | |
 NH | 140 | 7.9 | 558 | 8.1 | |
Smoking status at diagnosis, % | Â | Â | Â | Â | Â |
 Never | 955 | 53.7 | 3,237 | 46.8 | <0.001 |
 Former | 564 | 31.7 | 2,376 | 34.4 | |
 Current | 256 | 14.4 | 1,258 | 18.2 | |
 Missing | 3 | 0.2 | 42 | 0.6 | |
Education, % | Â | Â | Â | Â | Â |
 High school diploma or less | 1,070 | 60.2 | 3,924 | 56.8 | 0.04 |
 Some college | 383 | 21.5 | 1,538 | 22.2 | |
 College degree or higher | 320 | 18.0 | 1,424 | 20.6 | |
Parity, mean (SD)c | 3.1 | 1.6 | 3.1 | 1.6 | 0.5 |
Body mass index, % | Â | Â | Â | Â | Â |
 Underweight (< 18.5 kg/m2) | 24 | 1.3 | 102 | 1.5 | 0.002 |
 Normal (18.5-24.9 kg/m2) | 641 | 36.1 | 2,813 | 40.7 | |
 Overweight (25-29.9 kg/m2) | 626 | 35.2 | 2,276 | 32.9 | |
 Obese (≥ 30 kg/m2) | 450 | 25.3 | 1,542 | 22.3 | |
 Missing | 37 | 2.1 | 180 | 2.6 | |
Family history of breast cancer, % | Â | Â | Â | Â | Â |
 Yes | 418 | 23.5 | 1,445 | 20.9 | 0.04 |
 Missing | 27 | 1.5 | 127 | 1.8 |  |
Postmenopausal hormone therapy, % | Â | Â | Â | Â | Â |
 None | 539 | 30.3 | 4,541 | 65.7 | <0.001 |
 Estrogen only | 1,033 | 58.1 | 399 | 5.8 | |
 Estrogen plus progestin only | 52 | 2.9 | 1,561 | 22.6 | |
 Multiple/other formulations | 129 | 7.3 | 336 | 4.9 | |
Stage, % | Â | Â | Â | Â | Â |
 Local | 1,183 | 66.5 | 4,421 | 64.0 | 0.04 |
 Regional | 423 | 23.8 | 1,797 | 26.0 | |
 Distant | 23 | 1.3 | 140 | 2.0 | |
 Unknown | 149 | 8.4 | 555 | 8.0 | |
Histology, % | Â | Â | Â | Â | Â |
 Ductal | 1,407 | 79.1 | 5,429 | 78.5 | 0.01 |
 Lobular/non-ductal | 122 | 6.9 | 615 | 8.9 | |
 Other | 244 | 13.7 | 847 | 12.3 |  |