Table 2.

Comparison of statistics extracted from receiver operator characteristics for plane wave B-mode (top) and (PCI, bottom) grouped by stiffness (all peak negative pressures), including the area under the receiver operator characteristic (AUROC), accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value.

B-mode
Young’s modulus	AUROC	Accuracy	Sensitivity	Specificity	PPV	NPV
12.3 ± 3.7 kPa	0.940 ± 0.041	0.939 ± 0.020	0.512 ± 0.181	0.990 ± 0.007	0.845 ± 0.126	0.945 ± 0.020
22.1 ± 7.7 kPa	0.975 ± 0.027	0.963 ± 0.018	0.772 ± 0.209	0.986 ± 0.006	0.858 ± 0.025	0.974 ± 0.024
65.3 ± 8.5 kPa	0.976 ± 0.012	0.968 ± 0.009	0.718 ± 0.071	0.992 ± 0.005	0.891 ± 0.057	0.974 ± 0.009
85.8 ± 11.9 kPa	0.982 ± 0.015	0.972 ± 0.016	0.698 ± 0.328	0.994 ± 0.005	0.948 ± 0.048	0.975 ± 0.015
142 ± 22 kPa	0.993 ± 0.006	0.986 ± 0.006	0.877 ± 0.036	0.995 ± 0.003	0.935 ± 0.034	0.990 ± 0.004
PCI
Young’s modulus	AUROC	Accuracy	Sensitivity	Specificity	PPV	NPV
12.3 ± 3.7 kPa	0.958 ± 0.021	0.948 ± 0.015	0.582 ± 0.090	0.991 ± 0.006	0.884 ± 0.094	0.952 ± 0.010
22.1 ± 7.7 kPa	0.958 ± 0.026	0.959 ± 0.014	0.657 ± 0.098	0.993 ± 0.003	0.918 ± 0.028	0.962 ± 0.014
65.3 ± 8.5 kPa	0.985 ± 0.007	0.978 ± 0.004	0.799 ± 0.033	0.994 ± 0.004	0.929 ± 0.044	0.982 ± 0.003
85.8 ± 11.9 kPa	0.980 ± 0.011	0.967 ± 0.006	0.727 ± 0.117	0.992 ± 0.007	0.886 ± 0.145	0.972 ± 0.012
142 ± 22 kPa	0.994 ± 0.006	0.991 ± 0.005	0.915 ± 0.055	0.998 ± 0.002	0.968 ± 0.026	0.993 ± 0.006