TABLE 1.
Patient Characteristics
| Characteristic | Cohort 1 (N = 398) | Cohort 2 (N = 302) |
|---|---|---|
| Age at diagnosis (years) a | 58 (50–64) | 48 (42–57) |
| Largest tumor diameter (cm) a | 1.7 (1.2–2.5) | 1.3 (0.8–1.9) |
| Histological grade (%) | ||
| Grade I | 161 (41) | 26 (9) |
| Grade II | 181 (46) | 106 (35) |
| Grade III | 44 (11) | 157 (52) |
| Unknown | 8 (2) | 13 (4) |
| Progesterone receptor | ||
| Negative | 99 (25) | 49 (16) |
| Positive | 294 (75) | 253 (84) |
| Unknown | 1 (0) | 0 (0) |
| Axillary load (%) | ||
| 0 positive lymph nodes | 265 (67) | 166 (55) |
| 1–3 positive lymph nodes | 101 (26) | 99 (33) |
| 4 or more positive lymph nodes | 24 (6) | 36 (12) |
| Unknown | 4 (1) | 1 (0) |
All patients had unilateral estrogen receptor‐positive/HER2‐negative breast cancer. Values represent number of patients (percentages).
a
Values represent median value (interquartile range).