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Diagnostic accuracy of BTA U-score (from the most experienced observer) for differentiating benign (U = 1–2) from malignant (U = 3–5) thyroid nodules, but by considering mixed internal vascularity in isoechoic homogenous nodules as a benign feature.
| Statistic | n/N | Estimate (95% CI) |
|---|---|---|
| Sensitivity | 9 / 17 | 53% (28%, 77%) |
| Specificity | 47 / 56 | 84% (72%, 92%) |
| Positive predictive value | 9 / 18 | 50% (26%, 74%) |
| Negative predictive value | 47 / 55 | 86% (73%, 94%) |
| Accuracy | 56 / 73 | 77% (64%, 86%) |
