Table 3.
Characteristics according to age groups (<40 years x≥40 years)
| Patient characteristic | Total Number | <40 years (%) | ≥40 years (%) | p value |
|---|---|---|---|---|
| Number of patients | 11.385 | 17% | 83% | |
| Pathologic T1 (<2 cm) | 3.167 | 43% | 50% | p=0.0001 |
| Pathologic N0 | 2.599 | 44% | 51% | p=0.001 |
| Pathologic Stage 0, 1, 2 | 2.841 | 71.5% | 77.5% | p=0.005 |
| Histologic Grade 3 | 3.212 | 60% | 48% | p=0.0001 |
| Receptor positivity | 3.442 | 61% | 71% | p=0.0001 |
| ER | ||||
| PR | 3.199 | 57% | 59% | p>0.05 |
| HoR | 3.328 | 77% | 71% | p=0.005 |
| HER-2 | 1.703 | 26.5% | 22.2% | p<0.05 |
| Molecular subtype | 1.692 | 17% | 83% | |
| Luminal A | 1.054 | 56% | 64% | p<0.05 |
| Luminal B | 247 | 19% | 14% | p<0.05 |
| HER-2 Positive | 144 | 8% | 8% | NS |
| Triple Negative | 247 | 17% | 14% | NS |
ER: Estrogen; PR: progesterone; DCIS: ductal carcinoma in situ; HoR: hormone receptor