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Diagnostic value of each ultrasonographic characteristic.
| Characteristics | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|
| Tumor size >3 cm | 23.1 | 61.8 | 40.9 | 41.2 |
| Microcalcification | 59.0 | 79.4 | 76.7 | 62.8 |
| Irregular margins | 51.3 | 91.2 | 87.0 | 62.0 |
| Hypoechogenicity | 46.2 | 82.4 | 75.0 | 57.1 |
| Taller-than-wide shape | 30.8 | 94.1 | 85.7 | 54.2 |
| Absence of halo sign | 74.4 | 55.9 | 65.9 | 65.5 |
PPV, positive predictive value, NPV, negative predictive value.
