Table 1.
Characteristics of the Carolina Breast Cancer Study cases
| N = 2039 | |
|---|---|
| Age, years | |
| Mean (SD) | 51.9 (11.7) |
| Range | 23 – 74 |
| Ethnicity, n (%) | |
| African American | 766 (38) |
| European American | 1,273 (62) |
| Menopausal status, n (%) | |
| Premenopausal | 912 (45) |
| Postmenopausal | 1,127 (55) |
| Stage at diagnosis, n (%)‡ | |
| In situ | 451 (23) |
| Invasive: | |
| I | 635 (33) |
| II | 663 (34) |
| III | 153 (8) |
| IV | 44 (2) |
| Estrogen receptor status, n (%) | |
| Positive | 1,045 (59) |
| Negative | 719 (41) |
| Follow up period, years | |
| Median | 9.0 |
| Range | 0.4–13.7 |
SD = standard deviation;
‡
American Joint Committee on Cancer criteria.