Table 3.
Logistic regression analysis of factors associated with residual tumor.
| Variable | Unadjusted OR (95% CI) | P | Adjusted OR* (95% CI) | P |
|---|---|---|---|---|
| Age a | 1.02(0.98-1.06) | 0.299 | 1.03(0.99-1.07) | 0.206 |
| Dominant feature | ||||
| Mass only | 1.00 | 1.00 | ||
| Mass with calcification | 1.45(0.55-3.84) | 0.453 | 1.84(0.62-5.45) | 0.270 |
| Largest tumor dimension/mm | ||||
| ≤10 | 1.00 | 1.00 | ||
| 10-20 | 1.81(0.66-4.98) | 0.247 | 1.62(0.54-4.89) | 0.391 |
| >20 | 0.93(0.30-2.85) | 0.895 | 0.59(0.17-2.08) | 0.413 |
| Histological type | ||||
| IDC | 1.00 | 1.00 | ||
| DCIS | 0.32(0.13-0.78) | 0.013 | 0.44(0.16-1.17) | 0.098 |
| Others b | 0.62(0.21-1.80) | 0.376 | 0.83(0.26-2.65) | 0.83 |
| Lymph node status | ||||
| LN- c | 1.00 | 1.00 | ||
| LN+ d | 3.17(1.00-10.03) | 0.049 | 3.51(0.98-12.54) | 0.053 |
Abbreviations: IDC: invasive ductal carcinoma; DCIS: ductal carcinoma in situ; OR: odds ratio; CI: confidence interval.
a Continuous variable.
b Others included invasive lobular carcinoma (2 cases), mucinous carcinoma (9 cases), phylloides tumor (2 cases), signet-ring cell carcinoma (1 case), medullary carcinoma (1 case), metaplastic carcinoma (1 case), intraductal papillary carcinoma (1 case).
c No metastatic axillary lymph node.
d One or more metastatic axillary lymph node.
* Each covariate adjusted for all others.