Table 1. C-index of the prediction model.

Dataset group	C-index of the prediction model
	C-index	The C-index (95% CI)
Training set	0.915	0.840-0.989
Validation set	0.945	0.869-1.000
Entire Cohort	0.923	0.866-0.980
Clinic cohort	0.77	0.642-0.897