TABLE 1.

Comparison of the risk model and other models.

Study	Signature	AUCs in the training set	AUCs in the validation set
Our study	5-Gene	0.774, 0.715, and 0.677 (TCGA N = 365)	0.734, 0.725, and 0.738 (ICGC N = 231)
Liu et al. (2020)	7-Gene	0.778, 0.754, and 0.742 (TCGA N = 365)	0.717, 0.636, and 0.616 (ICGC N = 231)
Ouyang et al. (2020)	12-Gene	0.77, 0.73, and 0.72 (TCGA N = 365)	0.630, 0.680, and 0.660 (GEO N = 233)
Zhang et al. (2020)	9-Gene	0.805 (TCGA N = 365)	0.582 (ICGC N = 231)
Pan et al. (2020)	4-Gene	0.700, 0.652, and 0.630 (TCGA N = 365)	No external validation