Table S5. Time-dependent ROC analysis for cTNM, pTNM and radiomics index.

OS	Training cohort			Validation cohort
	AUC (95% CI)	P*		AUC (95% CI)	P*
*, P value was calculated by comparing AUC with that of Radiomics index; ROC, receiver operating characteristic curve; cTNM, clinical TNM stage; pTNM, pathological TNM stage; OS, overall survival; AUC, area under the ROC curve; 95% CI, 95% confidence interval.
1-year
Radiomics index	0.703 (0.640−0.765)	−		0.641 (0.557−0.724)	−
pTNM	0.679 (0.627−0.731)	0.483		0.609 (0.537−0.680)	0.516
cTNM	0.585 (0.523−0.648)	<0.001		0.493 (0.407−0.579)	0.002
3-year
Radiomics index	0.684 (0.642−0.725)	−		0.665 (0.604−0.726)	−
pTNM	0.691 (0.654−0.729)	0.741		0.684 (0.63−0.738)	0.595
cTNM	0.563 (0.520−0.605)	<0.001		0.513 (0.452−0.574)	<0.001
5-year
Radiomics index	0.694 (0.653−0.735)	−
pTNM	0.728 (0.691−0.764)	0.150
cTNM	0.553 (0.510−0.596)	<0.001