Table 1. Statistics comparing intraclass similarity measures in real cases (real vs real), and interclass similarity measures (real vs phantom).

P-values (p), Cohen’s d effect size (cD) and AUC values are reported using Kolmogorov–Smirnov distance (d_KS) and match distance (d_M) for the three evaluation measurements computed. Mean and standard deviations of intraclass (in real cases) and interclass distance values are also displayed on the right.

		p	cD	AUC	real vs real	real vs phantom
Intensity	dKS	0.172	0.267	0.607	0.024±0.015	0.020±0.015
	dM	0.706	0.049	0.530	0.224±0.148	0.231±0.144
Dispersion	dKS	0.458	0.190	0.558	0.073±0.040	0.065±0.040
	dM	0.305	0.252	0.581	5.749±3.005	4.919±3.328
Relationship	dKS	0.346	0.241	0.574	0.215±0.135	0.245±0.122
arteries–airways	dM	0.271	0.358	0.586	8.489±5.140	11.051±7.324