224 chapter 2 Figure 67. SROC curves of individual ultrasound characteristics (continued) Summary receiver operating characteristic plot showing sensitivity versus 1-specificity of individual ultrasound characteristics in indeterminate thyroid nodules (left column) with available histopathology, including Bethesda III and IV subgroups (middle and right columns, respectively). AUC, area under the curve; n.a., not applicable; n.a.c., not able to calculate; SROC, summary receiver operating characteristic. all indeterminate thyroid nodules Bethesda III nodules Bethesda IV nodules AUC = 0.62 (0.58-0.66) AUC = 0.68 (0.64-0.72) AUC = 0.68 (0.64-0.72) AUC = 0.52 (0.47-0.56) AUC = 0.84 (0.80-0.87) AUC = 0.49 (0.45-0.54) AUC = 0.63 (0.59-0.67) Increased intranodular vascularization 0LFURFDOFL¿FDWLRQV 0DFURFDOFL¿FDWLRQV n.a.c. AUC = 0.63 (0.59-0.67)
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