Table 1. Input variables.
| Input | Breast Cancer | Non-Breast Cancer |
|---|---|---|
| Age | 62.6 (± 5.3) | 62.5 (± 5.4) |
| Age at Menarche | 12.6 (± 1.5) | 12.7 (± 1.5) |
| Age at First Live Birth* | 23.7 (± 4.6) | 23.0 (± 4.3) |
| Number of First-Degree Relatives Who Have Had Breast Cancer | 0.2 (± 0.5) | 0.2 (± 0.4) |
| Race / Ethnicity | ||
| White | 94.8% | 92.8% |
| Black | 3.6% | 5.6% |
| Hispanic (Born in US) | 1.4% | 1.3% |
| Hispanic (Born Abroad) | 0.2% | 0.3% |
| Age at Menopause | 48.6 (± 5.0) | 48.0 (± 5.1) |
| Current Hormone Usage | 58.8% | 50.6% |
| Years of Hormone Usage | 4.7 (± 4.1) | 4.1 (± 4.1) |
| BMI | 27.1 (± 5.3) | 27.3 (± 5.6) |
| Pack Years of Cigarettes Smoked | 14.6 (± 23.9) | 13.3 (± 22.4) |
| Birth Control Usage | 2.9 (± 3.6) | 2.7 (± 3.6) |
| Number of Live Births | 2.8 (± 1.4) | 2.9 (± 1.5) |
| Personal History of Prior Cancer | 4.2% | 3.4% |
We show the means and standard deviations for the continuous variables and the percentages for the indicators.
* Among parous women.