| Parameter | OR | 95% CI | p-value |
|---|---|---|---|
| ER | |||
| Positive | 0.368 | 0.247-0.549 | < 0.0001 |
| Negative | 1 | ||
| p53 | |||
| Positive | 1.083 | 0.722-1.626 | 0.6991 |
| Negative | 1 | ||
| HER2 amplification | |||
| Positive | 1.050 | 0.705-1.562 | 0.8108 |
| Negative | 1 | ||
| Ki-67 level (%) | |||
| ≥ 15 | 2.819 | 1.861-4.272 | < 0.0001 |
| < 15 | 1 | ||
| Calcification | |||
| Present | 0.692 | 0.466-1.028 | 0.0680 |
| Absent | 1 | ||
| DCIS component | |||
| Present | 0.277 | 0.180-0.428 | < 0.0001 |
| Absent | 1 | ||
| Size difference between MRI and sonography (cm) | |||
| > 0.5 | 0.757 | 0.633-0.904 | 0.0022 |
| ≤ 0.5 | 1 | ||
| Initial tumor size (cm) | 0.694 | 0.616-0.781 | < 0.0001 |
| Age (yr) | |||
| < 35 | 0.926 | 0.543-1.580 | 0.7791 |
| ≥ 35 | 1 | ||
| Histologic type | |||
| IDC | 1 | ||
| ILC | 0.285 | 0.095-0.857 | 0.0254 |
| No. of chemotherapy courses | |||
| < 6 | 1 | ||
| ≥ 6 | 1.310 | 0.835-2.054 | 0.2399 |
OR, odds ratio; CI, confidence interval; ER, estrogen receptor; DCIS, ductal carcinoma in situ; MRI, magnetic resonance imaging; IDC, invasive ductal carcinoma; ILC, invasive lobular carcinoma.