Table 3.

C-index in the nomogram based on training cohort and validation cohort.

	C-index (95% CI)	Dxy	aDxy	Variance	Z value	P value	n
Training cohort	0.839 (0.804, 0.874)	0.678	0.678	0.036	19.055	<0.001	2058
Validation cohort	0.822 (0.777, 0.868)	0.644	0.644	0.047	13.827	<0.001	683