Table 1.
Demographic and Clinical Characteristics of Patients Participating in Southwest Oncology Group SWOG-8897 From Whom DNA Was Available
| Characteristic | % Treated Group (n = 453) | % Untreated Group (n = 868) |
|---|---|---|
| Age, years | ||
| < 40 | 15 | 8 |
| 40-49 | 37 | 31 |
| 50-59 | 23 | 25 |
| 60-69 | 19 | 24 |
| ≥ 70 | 6 | 12 |
| Median | 49 | 54 |
| Range | 27-85 | 24-89 |
| Race | ||
| White (non-Hispanic) | 88 | 92 |
| Black (non-Hispanic) | 6 | 4 |
| Hispanic | 2 | 2 |
| Other | 4 | 2 |
| Menopausal status | ||
| Premenopausal | 50 | 38 |
| Postmenopausal | 50 | 62 |
| Postmenopausal estrogen | ||
| Yes | 14 | 18 |
| No | 86 | 82 |
| Primary treatment | ||
| BCS, delayed RT | 18 | 23 |
| BCS, RT prior to registration | 12 | 13 |
| Mastectomy | 70 | 64 |
| Tumor size, cm | ||
| ≤ 1 | 25 | 59 |
| 1.1-1.9 | 75 | 40 |
| MPO genotypes | ||
| AA | 5 | 3 |
| GA | 30 | 33 |
| GG | 65 | 64 |
Abbreviations: BCS, breast-conserving surgery; RT, radiation therapy; MPO, myeloperoxidase.