Table 4.

Validation at 12 months using the test and external validation datasets

	Mean	SE	95% CI	Mean	SE	95% CI
	Test set			External validation
Harrell’s C-index	0.794	0.006	0.782–0.807	0.671	0.012	0.647–0.695
D-statistic	1.865	0.048	1.770–1.959	0.983	0.080	0.826–1.141
Calibration slope	0.947	0.024	0.900–0.993	0.544	0.046	0.454–0.635