Table 6. The predictive performance of the nomogram, clinical predictors, and Rad-score.

Cohort	Nomogram	Clinical	Rad-score	P
				Nomogram vs. clinical	Nomogram vs. Rad-score	Clinical vs. Rad-score
Training cohort (n=108)				0.016	0.023	0.708
AUC (95% CI)	0.830 (0.746, 0. 896)	0.766 (0.675, 0.842)	0.744 (0.651, 0.823)
ACC	0.778	0.704	0.704
SEN	0.768	0.652	0.638
SPE	0.795	0.795	0.821
Validation cohort (n=45)				0.068	0.017	0.546
AUC (95% CI)	0.879 (0.748, 0.957)	0.781 (0.633, 0.891)	0.718 (0.564, 0.842)
ACC	0.822	0.644	0.689
SEN	0.759	0.483	0.655
SPE	0.938	0.75	0.938

ACC, accuracy; AUC, area under the receiver operating characteristic curve; CI, confidence interval; Rad-score, radiomics score; SEN, sensitivity; SPE, specificity.