Table 1.
Basic characteristics of the enrolled patients
| Variables | No. (%) |
|---|---|
| Age (years) | |
| ≤ 50 | 77 (53) |
| > 50 | 68 (47) |
| Pathologic T stage | |
| 1 | 50 (35) |
| 2–4 | 95 (65) |
| Pathologic N stage | |
| 0 | 54 (37) |
| 1–3 | 91 (63) |
| Histologic grade | |
| 1–2 | 92 (64) |
| 3 | 53 (36) |
| Lymphovascular invasion | |
| Absent | 86 (59) |
| Present | 59 (41) |
| Type of surgery | |
| Breast conserving surgery | 35 (24) |
| Mastectomy | 110 (76) |
| Estrogen receptor | |
| Negative | 64 (44) |
| Positive | 81 (56) |
| Progesterone receptor | |
| Negative | 87 (60) |
| Positive | 58 (40) |
| HER2 | |
| Negative | 108 (75) |
| Positive | 37 (25) |
| Chemotherapy | |
| Neoadjuvant | 44 (30) |
| Adjuvant | 95 (66) |
| No | 6 (4) |
| Adjuvant radiotherapy | |
| No | 81 (56) |
| Yes | 64 (44) |
HER2, human epidermal growth factor receptor 2