Table 2.

Sensitivity, specificity, PPV, and Youden’s Index for cut-off values and morphological criteria by CT and MRI

	Sensitivity	Specificity	PPV	Youden’s Index
CT
Size, cut-off value
4 mm	95.3%	0%	70.7%	− 0.05
5 mm	95.3%	0%	70.7%	− 0.05
6 mm	90.7%	11.7%	72.2%	− 0.02
7 mm	83.7%	17.6%	72.0%	0.01
8 mm	67.4%	41.2%	74.4%	0.08
9 mm	51.1%	58.8%	75.9%	0.10
10 mm	44.2%	82.4%	86.4%	0.27
11 mm	34.9%	88.2%	88.2%	0.23
Morphological criterion
Lobulated	62.7%	52.9%	77.1%	0.16
Spiculated	11.6%	88.2%	71.4%	− 0.00
Indistinct	2.3%	94.1%	50.0%	− 0.04
Inhomogeneous	25.6%	94.1%	91.7%	0.20
MRI
Size, cut-off value
7 mm	75.0%	0%	60.0%	− 0.25
8 mm	58.3%	83.3%	87.5%	0.42
9 mm	58.3%	66.7%	77.8%	0.25
10 mm	58.3%	83.3%	87.5%	0.42
11 mm	25.0%	83.3%	75.0%	0.08
12 mm	16.7%	83.3%	66.7%	0.00
13 mm	16.7%	83.3%	66.7%	0.00
14 mm	8.3%	83.3%	50.0%	− 0.08
15 mm	8.3%	83.3%	50.0%	− 0.08
Morphological criterion
Lobulated	16.7%	66.7%	50.%	− 0.17
Spiculated	8.3%	100%	35.3%	0.08
Indistinct	Not visible
Inhomogeneous	Not visible