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Table 4 Optimism calculated performance for the C statistic, c-slope, D statistic and R2 for the multivariable models

From: The use of electronic healthcare records for colorectal cancer screening referral decisions and risk prediction model development

StatisticApparent PerformanceOptimism (100 bootstrap replications)Optimism adjusted performance (apparent minus optimism)
Model for participants with positive and negative FOBT results
 C statistic0.8630.0020.860
 c-slope1.0000.0030.997
 D statistic2.5190.0282.491
 R20.6020.0050.597
Model for negative FOBT patients only
 C statistic0.6040.0070.597
 c-slope1.0000.0600.940
 D statistic0.5720.0390.533
 R20.0720.0100.062