Research Article
Computed Tomography Features of Incidentally Detected Diffuse Thyroid Disease
Table 2
Diagnostic indices of a cut-off value of parenchymal Hounsfield unit in nonenhanced CT for detecting diffuse thyroid disease in 209 patients.
| Cut-off
HU value | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) | ROC (AUC) | 95% confidence interval |
| | 80 or less | 14/52 (26.9) | 149/157 (94.9) | 14/22 (63.6) | 149/187 (79.7) | 163/209 (78.0) | 0.6091 | 0.2692–0.9490 | | 90 or less | 25/52 (48.1) | 138/157 (88.5) | 25/43 (58.1) | 138/165 (83.6) | 163/209 (78.0) | 0.6831 | 0.4808–0.8846 | | 100 or less | 34/52 (65.4) | 129/157 (82.2) | 34/62 (54.8) | 129/147 (87.8) | 163/209 (78.0) | 0.7378 | 0.6538–0.8217 |
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HU: Hounsfield unit; PPV: positive predictive value; NPV: negative predictive value; ROC: receiver-operating characteristic analysis; AUC: area under curve.
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