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Table 8 Model performance parameters.

From: The search for stable prognostic models in multiple imputed data sets

Persistent disability Persistent shoulder pain intensity
  CCA MI-5 B MI-5 + B CCA MI-5 B MI-5 + B
calibration slope 0.978 0.978 1.077 0.978 0.985 0.973 0.998 0.986
R2 N 0.119 0.120 0.088 0.120 0.188 0.162 0.135 0.174
Ac 95% CI 0.666 0.616,0.715 0.667 0.624,0.710 0.645 0.596,0.694 0.667 0.624,0.710 0.717 0.668,0.766 0.702 0.660,0.745 0.684 0.637,0.732 0.710 0.668,0.752
Opt 0.027 0.022 0.023 0.022 0.030 0.014 0.018 0.022
Oc 0.639 0.646 0.622 0.646 0.686 0.688 0.667 0.688
  1. Ac               - apparent c-index
  2. B                - bootstrapping based on a complete case data set
  3. CCA            - complete case analysis
  4. MI-5+B        - multiple imputation combined with bootstrapping
  5. MI-5            - multiple imputation using 5 imputation files
  6. Oc              - optimism corrected c-index
  7. Opt             - estimation of the overoptimism
  8. R2 N            - explained variance (Nagelkerke's R-squared)
  9. 95% CI        - 95% confidence interval