Computed Tomography Features of Incidentally Detected Diffuse Thyroid Disease

Figure 5

Receiver-operating characteristic (ROC) analysis for CT classification in the differentiation of diffuse thyroid disease (DTD) from normal thyroid. When the cases having “1 or more,” “2 or more,” and “3 or more” abnormal CT features are considered DTD, the values are 0.6238 (short dashed line), 0.5421 (dotted and dashed line), and 0.7566 (long dashed line), respectively. When “3 or more” CT classification is selected, the sensitivity, specificity, positive and negative predictive values, and accuracy of CT diagnosis for DTD are 55.8%, 95.5%, 80.6%, 86.7%, and 85.6%, respectively.