Table 1.
Patient characteristics
| Patient characteristics | Frequency (n) | Percentage (%) |
|---|---|---|
| Age (years) | ||
| < 50 | 134 | 65.7 |
| ≥ 50 | 70 | 34.3 |
| Location | ||
| Left | 103 | 50.5 |
| Right | 94 | 46.1 |
| Bilateral | 7 | 3.4 |
| Smoking | ||
| No | 170 | 83.3 |
| Yes | 34 | 16.7 |
| Size (cm) | ||
| ≤ 2.0 | 59 | 28.9 |
| 2.0 < S ≤ 5.0 | 122 | 59.8 |
| > 5.0 | 23 | 11.3 |
| Differentiation | ||
| G 1 | 50 | 24.5 |
| G 2 | 98 | 48.0 |
| G 3 | 56 | 27.5 |
| Tumor stage | ||
| T1 | 60 | 29.4 |
| T2 | 117 | 57.4 |
| T3 | 18 | 8.8 |
| T4a | 9 | 4.4 |
| Lymph node metastasis | ||
| N0 | 106 | 52.0 |
| N1 | 69 | 33.8 |
| N2 | 24 | 11.8 |
| N3 | 5 | 2.5 |
| TNM stagesII | ||
| I | 33 | 16.2 |
| II | 126 | 61.8 |
| III | 45 | 22.1 |
| ER expression | ||
| Negative | 94 | 46.1 |
| Positive | 110 | 53.9 |
| PR expression | ||
| Negative | 120 | 58.8 |
| Positive | 84 | 41.2 |
| HER2 expression | ||
| Negative | 145 | 71.1 |
| Positive | 59 | 28.9 |