Table 1.
Demographic and lifestyle characteristics of 219 The Cancer Genome Atlas (TCGA) women in this study.
| Clinical Characteristics | ||
| TCGA site, n (%) | Mayo Clinic | 57 (26.0) |
| Memorial Sloan Kettering Cancer Center | 45 (20.5) | |
| University of Pittsburgh | 44 (20.1) | |
| Roswell Park Comprehensive Cancer Center | 73 (33.3) | |
| Age at initial diagnosis, n (%) | <45 years | 45 (20.5) |
| ≥45 to <55 years | 69 (31.5) | |
| ≥55 to <65 years | 53 (24.2) | |
| ≥65 years | 52 (23.7) | |
| Disease stage, n (%) | I | 50 (22.8) |
| II | 130 (59.4) | |
| III | 39 (17.8) | |
| Tumor grade, n (%) | 1 | 37 (16.9) |
| 2 | 63 (28.8) | |
| 3 | 47 (21.5) | |
| Missing | 72 (32.9) | |
| Race, n (%) | White | 192 (87.7) |
| Non White | 20 (9.1) | |
| Missing | 7 (3.2) | |
| Estrogen receptor status, n (%) | Positive | 179 (81.7) |
| Negative | 40 (18.3) | |
| Progesterone receptor status, n (%) | Positive | 158 (72.1) |
| Negative | 61 (27.9) | |
| HER2 status, n (%) | Positive | 28 (12.8) |
| Negative | 186 (84.9) | |
| Missing | 5 (2.3) | |
| Modifiable Risk Factors | ||
| BMI, n (%) | <25 | 71 (32.4) |
| ≥25 to <30 | 53 (24.2) | |
| ≥30 | 77 (35.2) | |
| Missing | 18 (8.2) | |
| Pre-diagnostic cigarette smoking, n (%) | Smoker | 81 (37.0) |
| Non-smoker | 104 (47.5) | |
| Missing | 34 (15.5) | |
| Pre-diagnostic alcohol consumption, n (%) | Current drinker | 129 (58.9) |
| Non-drinker | 46 (21.0) | |
| Missing | 44 (20.1) |