Table 1.
Patient Demographics and Clinical Characteristics
| Demographic or Clinical Characteristic | No. of Patients (N = 282) | % |
|---|---|---|
| Age at surgery, years | ||
| Median | 51 | |
| Range | 31-83 | |
| Menopausal status | ||
| Premenopausal | 123 | 43.6 |
| Postmenopausal | 149 | 52.8 |
| Unknown | 10 | 3.6 |
| Tumor size, cm | ||
| ≤ 2 | 159 | 56.4 |
| 2.1-5 | 106 | 37.6 |
| > 5 | 2 | 0.7 |
| Unknown | 15 | 5.3 |
| Nodal status | ||
| Negative | 230 | 81.6 |
| Positive | 48 | 17.0 |
| Unknown | 4 | 1.4 |
| ER status | ||
| Positive | 208 | 73.8 |
| Negative | 25 | 8.9 |
| Unknown | 49 | 17.3 |
| PR status | ||
| Positive | 195 | 69.1 |
| Negative | 36 | 12.8 |
| Unknown | 51 | 18.1 |
| HER2 | ||
| Positive* | 5 | 1.8 |
| Negative | 97 | 34.4 |
| Unknown | 180 | 63.8 |
| Events | ||
| No event | 241 | 85.5 |
| Locoregional events | 9 | 3.2 |
| Distant metastasis events | 22 | 7.8 |
| Contralateral breast events | 10 | 3.5 |
Abbreviations: ER, estrogen receptor; PR, progesterone receptor; HER2, human epidermal growth factor receptor 2.
*
Score of 3+ in immunohistochemistry.