Table 1.
Clinicopathological variables in the patients entered into this study
| Characteristic | No. of patients (%) |
| Total | 103 (100) |
| Age (years) | |
| ≤50 | 31 (30) |
| >50 | 72 (70) |
| Invasive tumours | |
| Lymph node status | |
| Negative | 37 (41) |
| Positive | 53 (59) |
| Not assessed | 13 |
| Invasive tumour grade | |
| Grade I | 16 (16) |
| Grade II | 51 (49) |
| Grade III | 36 (35) |
| Invasive tumour size (cm) | |
| ≤2 cm | 53 (52) |
| >2 cm | 48 (48) |
| Multifocal | 2 |
| Lymphovascular invasion | |
| Present | 50 (50) |
| Absent | 50 (50) |
| Not assessed | 3 |
| NPI | |
| GPG < 3.4 | 34 (39) |
| MPG 3.4–5.4 | 37 (42) |
| PPG > 5.4 | 17 (19) |
| Not possible to calculate | 15 |
| ER (quick-score) | |
| Positive (4–8) | 63 (64) |
| Negative (0–3) | 36 (36) |
| Not assessed | 4 |
| HER-2 IHC | |
| Negative (0/1+) | 87 (84) |
| Positive (2+/3+) | 16 (16) |
| Ki67 IHC | |
| Low proliferation, <10% | 51 (50) |
| High proliferation, ≥10% | 52 (50) |
| Ductal carcinoma in situ | |
| VNPC | |
| Grade I | 23 (24) |
| Grade II | 36 (37) |
| Grade III | 38 (39) |
| Not assessed | 6 |
| ER (quick-score) | |
| Positive (4–8) | 61 (64) |
| Negative (0–3) | 35 (36) |
| Not assessed | 7 |
| HER-2 IHC | |
| Negative (0/1+) | 77 (80) |
| Positive (2+/3+) | 19 (20) |
| Not assessed | 7 |
| Ki67 IHC | |
| Low proliferation, <10% | 61 (59) |
| High proliferation, ≥10% | 42 (41) |
ER, oestrogen receptor; GPG, good prognostic group; IHC, immunohistochemistry; MPG, moderate prognostic group; NPI, Nottingham Prognostic Index; PPG, poor prognostic group; VNPC, Van Nuys Pathologic classification.