Table 2. Performance of considered statistical measures in classifying COVID-19 cases.

COVID-19 - Coronavirus disease 2019; EMD - Earth Mover’s distance; KS - Kolmogorov-Smirnov; HUs - Hounsfield units.

	Mean HUs	Median HUs	Proportion above Mean HUs	Skewness	EMD	KS distance
True positive	54/62	49/62	46/62	57/62	45/62	33/62
True negatives	17/18	16/18	14/18	15/18	14/18	13/18
Sensitivity	0.871	0.790	0.742	0.919	0.726	0.532
Specificity	0.944	0.889	0.778	0.833	0.778	0.722
Positive predictive value	0.982	0.961	0.920	0.950	0.918	0.868
Negative predictive value	0.680	0.552	0.467	0.750	0.452	0.310
Accuracy	0.888	0.813	0.750	0.900	0.738	0.575