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. 2012 Jan;33(1):124–127. doi: 10.3174/ajnr.A2732

Table 3:

Diagnostic sensitivity, specificity, PPV, NPV, and accuracy of the individual US features suggesting CBCNsa

Characteristics No. (%) Sensitivity Specificity PPV NPV Accuracy
Ovoid-to-round 13 (100) 100 39 45 100 59
Ill-defined margin 11 (85) 85 77 65 91 80
Inner isoechoic rim 11 (85) 85 81 69 91 82
Low-echoic halo 10 (77) 77 89 77 89 85

Note:—PPV indicates positive predictive value; NPV, negative predictive value.

a

Data are percentages.