Table 2.

Reduced Models’ Somers’ D Statistic showing 5–7% loss in predictive power.

Model	Original	Training data	Test data	Optimism	Corrected
Model B-r	−0.36	−0.40	−0.33	−0.07	−0.29
Model C-r	−0.49	−0.50	−0.45	−0.05	−0.43