TABLE 2.

Performance of models.

Model	Training cohort				Test cohort
	C-Index	Concordance probability	IBS	AIC	C-Index	Concordance probability	IBS	AIC
Clinical nomogram	0.633	0.040	0.094	470	0.560	0.051	0.127	112
Radiomics_ET signature	0.632	0.034	0.096	673	0.535	0.054	0.151	145
Radiomics_NET signature	0.632	0.034	0.093	678	0.584	0.061	0.134	142
Radiomics_ED signature	0.654	0.031	0.091	666	0.557	0.052	0.146	146
Radiomics_Con Nomogram	0.656	0.040	0.090	468	0.535	0.053	0.127	146
Radiomics_ET+Radiomics_ NET + Radiomics_ED Nomogram	0.717	0.038	0.077	452	0.655	0.066	0.125	143