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. Author manuscript; available in PMC: 2022 Jul 1.
Published in final edited form as: Ultrasound Med Biol. 2021 Apr 6;47(7):1670–1680. doi: 10.1016/j.ultrasmedbio.2021.02.006

Table 3:

Thresholds determined by maximizing the Youden index of the ROC curves shown in Figure 7, along with the corresponding area under the receiver operating characteristic curve (AUC), positive predictive value (PPV), negative predictive value (NPV), sensitivity, and specificity.

Threshold AUC PPV NPV Sensitivity Specificity
SWS 5.6 m/s 0.84 69% 89% 81% 82%
SWS Ratio 1.11 0.90 79% 88% 75% 90%
Histogram Equalized ARFI 104 0.80 60% 86% 75% 75%
Histogram Equalized ARFI Ratio 0.94 0.85 65% 92% 86% 76%