Method Sensitivity Specificity Youden Index PPV NPV
CoV ≥ 0.7 81 88 69 94% 64%
VE < 50 90 88 78 95% 78%
TZI > 0 81 88 69 94% 64%
V2S/V3R > 1.5 90 63 53 86% 71%