Covariates | ER- | ER+ | Logistic likelihood ratio test P | ||
---|---|---|---|---|---|
 | n | % | N | % |  |
All | 114 | 66 | 58 | 34 | Â |
Menopausal status | Â | Â | Â | Â | Â |
   Pre * | 98 | 71 | 41 | 29 | 0.02 |
   Post | 15 | 47 | 17 | 53 |  |
   Unknown | 1 | 100 | 0 | 0 |  |
Age of breast cancer | Â | Â | Â | Â | Â |
   Median (range) | 40 (27-73) |  | 46 (29-72) |  |  |
   <40 | 54 | 77 | 16 | 23 | 0.01 |
   40-49 | 48 | 65 | 26 | 35 | 0.73 |
   ≥ 50 | 12 | 43 | 16 | 57 | 0.005 |
Prior HRT | Â | Â | Â | Â | Â |
   Yes * | 11 | 58 | 8 | 42 | 0.42 |
   No | 101 | 67 | 50 | 33 |  |
   Unknown | 2 | 100 | 0 | 0 |  |
Ashkenazi Jewish | Â | Â | Â | Â | Â |
   Yes * | 55 | 71 | 23 | 29 | 0.32 |
   No | 58 | 64 | 33 | 36 |  |
   Unknown * | 1 | 33 | 2 | 67 |  |
First live birth before breast cancer? | Â | Â | Â | Â | Â |
   Yes * | 86 | 65 | 46 | 35 | 0.57 |
   No | 28 | 72 | 11 | 28 |  |
   Unknown | 0 | 0 | 1 | 100 |  |
Age of first live birth (if before breast cancer) | Â | Â | Â | Â | Â |
   Median (range) | 27 (15-45) |  | 27 (19-42) |  |  |
   ≥ 27 * | 47 | 67 | 23 | 33 | 0.44 |
   <27 | 39 | 63 | 23 | 37 |  |
   No or unknown live births before breast cancer * | 28 | 70 | 12 | 30 |  |
Tobacco (pack years) | Â | Â | Â | Â | Â |
   0 * | 64 | 66 | 33 | 34 | 0.33 |
   >0 | 31 | 74 | 11 | 26 |  |
   Unknown * | 19 | 58 | 14 | 42 |  |
Alcohol | Â | Â | Â | Â | Â |
   0-1 drinks/week * | 65 | 68 | 30 | 32 | 0.75 |
   >1 drinks/week | 45 | 64 | 25 | 36 |  |
   Unknown * | 4 | 57 | 3 | 43 |  |