Comparison of CDH Mortality Risk Model Performance in Derivation and Validation Groups

Derivation ModelValidation Model
Performance measures of model comparing derivation and validation groups
 Goodness of fit (Hosmer and Lemeshow)7.0469 (P = .217) DF = 5
 C statistic (area under curve)0.8060.769
 Difference in C statistic0.037 (3.7%)
Estimation of optimism of model
 Cross-validationC statistic = 0.758
Difference in C statistic= 0.065
  • AIC, Akaike Information Criterion: –2LogL + 2(#regression coefficients).