Table 4.

Univariate analysis for semiquantitative PET/CT parameters and for radiomics features for the single scanner and for both scanners considered together. Only values with AUC > 0.6 and p-value < 0.05 are reported.

	Mean AUC			Mean p-Value
Parameters	Scanner 1	Scanner 2	Scanner 1 + 2	Scanner 1	Scanner 2	Scanner 1 + 2
SUVmax	0.762	0.679	0.748	<0.01	0.02	<0.01
SUVmean	0.724	0.675	0.748	<0.01	<0.01	<0.01
SUVlbm	0.757	0.685	0.748	<0.01	0.01	<0.01
SUVbsa	0.756	0.689	0.742	<0.01	0.01	<0.01
Histo entropy_log10	0.709	0.674	0.724	<0.01	<0.01	<0.01
Histo entropy_log2	0.705	0.674	0.724	<0.01	<0.01	<0.01
GLCM entropy_log10	0.713	0.664	0.702	0.02	0.03	<0.01
GLCM entropy_log2	0.712	0.664	0.703	0.02	0.03	<0.01
GLCM dissimilarity	0.719	0.682	0.727	0.01	<0.01	<0.01
GLRLM HGRE	0.731	0.693	0.741	0.03	0.03	<0.01
GLRLM SRHGE	0.739	0.682	0.744	0.02	0.02	<0.01
GLRLM LRLGE	0.707	0.653	0.715	0.01	0.01	<0.01
GLZLM SZE	0.734	0.671	0.693	<0.01	<0.01	0.01
GLZLM HGZE	0.740	0.668	0.740	0.02	0.03	<0.01
GLZLM SZHGE	0.758	0.693	0.733	0.02	0.03	<0.01
GLZLM ZP	0.692	0.669	0.699	<0.01	0.01	<0.01
Variables with good performances only at Scanner 1 + 2 analysis
GLCM contrast	0.733			0.01
GLZLM ZLNU	0.729			0.04
GLRLM LRLGE	0.715			<0.01
GLZLM LGZE	0.706			<0.01
GLRLM LGRE	0.703			<0.01
GLCM homogeneity	0.702			<0.01
GLRLM SRLGE	0.687			<0.01
NGLDM busyness	0.684			0.01
GLRLM RP	0.660			0.04
GLZLM SZLGE	0.651			<0.01

AUC: area under the curve.