Table 4.

The Harrell’s C-index and AUC results in the training and validation cohorts.

	Training cohort		Validation cohort
	C-index (95% CI)	AUC (95% CI)	C-index (95% CI)	AUC (95% CI)
PFS
Clinical model	0.748 (0.686-0.810)	0.758 (0.701-0.809)	0.729 (0.639-0.819)	0.776 (0.687-0.850)
C-R model	0.775 (0.722-0.828)	0.780 (0.724-0.829)	0.755 (0.678-0.831)	0.791 (0.704-0.863)
OS
Clinical model	0.834 (0.768-0.899)	0.846 (0.796-0.888)	0.832 (0.724-0.939)	0.850 (0.769-0.910)
C-R model	0.881 (0.829-0.933)	0.891 (0.846-0.926)	0.867 (0.781-0.953)	0.874 (0.797-0.929)

CI, confidence interval; AUC, area under the curve.