Table 4 Diagnostic Test Performance in Relation to Quantitative Signal Intensity and Lesion Sizea
| Â | Sensitivity | Specificity | Accuracy | Positive Predictive Value | Negative Predictive Value |
|---|---|---|---|---|---|
Signal Intensity Variables | |||||
 Contrast-to-noise ratio | 76% (29/38) | 100% (23/23) | 85% (52/61) | 100% (29/29) | 72% (23/32) |
 Signal-to-noise ratio | 71% (27/38) | 83% (19/23) | 75% (46/61) | 87% (27/31) | 63% (19/30) |
Lesion Size Variables | |||||
 Area (cm2) | 73% (29/40) | 83% (19/23) | 76% (48/63) | 88% (29/33) | 63% (19/30) |
 Maximal length (cm) | 63% (25/40) | 91% (21/23) | 73% (46/63) | 93% (25/27) | 58% (21/36) |