Table 2.
Multivariate logistic regression analysis of clinical and radiologic factor for predicting malignancy
| Variable | OR (95% CI) | P-value |
|---|---|---|
| Age | 0.90 (0.82–0.99) | 0.028 |
| Composition (reference:mixed) | 0 (0–0) | 0.990 |
| Echogenicity (reference:hyperechogenicity) | 0 (0–0) | 0.230 |
| Margin (reference:smooth margin) | 3.0 (0.42–21.4) | 0.360 |
| Shape (reference:wider than tall) | 11.3 (1.23–114.6) | 0.040 |
| Calcification (reference:no calcification) | 15.0 (1.49–150.2) | 0.021 |
| US category (reference:low suspicion) | 0 (0–0) | 0.280 |
| Emax | 1.22 (1.2–1.57) | 0.021 |
| Emean | 0.84 (0.72–1.01) | 0.070 |
| Emin | 1.10 (0.98–1.35) | 0.058 |
OR, odds ratio; CI, confidence interval; Emax, maximum pixel value for a region of interest (ROI); Emean, mean value for a 2-mm diameter ROI placed in the stiffest region; Emin, minimum pixel value for a ROI.