Table 4.
Diagnostic accuracy of BTA U-score for differentiating benign (U = 1–2) from malignant (U = 3–5) thyroid nodules, for the most experienced and less experienced observers and including mixed vascularity as a ‘potentially malignant’ feature.
| Most experienced observers (highest
specificity) |
Less experienced observer (lowest
specificity) |
|||
|---|---|---|---|---|
| Statistic | n/N | Estimate (95% CI) | n/N | Estimate (95% CI) |
| Sensitivity | 17 / 17 | 100% (81%, 100%) | 17 / 17 | 100% (82%, 100%) |
| Specificity | 19 / 56 | 34% (22%, 48%) | 16 / 56 | 29% (17%, 42%) |
| Positive predictive value | 17 / 54 | 32% (28%, 36%) | 17 / 57 | 30% (26%, 33%) |
| Negative predictive value | 19 / 19 | 100% (82%, 100%) | 16 /16 | 100% (81%, 100%) |
| Accuracy | 36 / 73 | 49% (37%, 61%) | 33 / 73 | 45% (34%, 57%) |