Patient Population
| Characteristic | Group A (n = 148) | Group B (n = 59) | Group C (n = 58) | Group D (n = 59) |
|---|---|---|---|---|
| Age ± SD (y) | 59.8 ± 9.5 | 58.1 ± 11.2 | 60 ± 11.8 | 61.4 ± 11.6 |
| Number of cancers | 150 | 60 | 60 | 60 |
| T1 stage (%) | 82.3 | 85.6 | 86.7 | 87.9 |
| T2 stage (%) | 17.7 | 15.4 | 13.3 | 12.1 |
| Grade I (%) | 34 | 25 | 35 | 18.1 |
| Grade II (%) | 45.3 | 53.3 | 31.7 | 66.7 |
| Grade III (%) | 20.7 | 21.7 | 33.3 | 15.2 |
| Tumor size in cm (mean) | 1.8 | 1.7 | 1.4 | 2 |
| Tumor size in cm (range) | 0.6–2.5 | 0.4–2.4 | 0.5–2.2 | 0.3–2.5 |
| Infiltrating ductal carcinoma (%) | 68 | 58.3 | 70 | 62.2 |
| SLN metastases (%) | 16.7 | 30 | 9.8 | 13.2 |