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Table 3 Classification matrix and sensitivity analysis for APACHE II in its original and new models

From: External validation of a modified model of Acute Physiology and Chronic Health Evaluation (APACHE) II for orthotopic liver transplant patients

   Died Alive       
Model Cutpoint (%) PD PS PD PS Sensitivity (%) Specificity (%) PPV (%) NPV (%) OMCR (%) OCCR (%)
Original 10 8 2 76 88 80 54 10 98 45 55
  30 3 7 7 157 30 96 30 96 8 92
  50 0 10 2 162 0 99 0 94 7 93
New 10 7 3 42 122 70 74 14 98 26 74
  30 2 8 3 161 20 98 40 95 6 94
  50 0 10 2 162 0 99 0 94 7 93
  1. OCCR, overall correct classification rate; OMCR, overall misclassification rate; NPV, negative predictive value; PDV, positive predictive value; PD, predicted to die; PS, predicted to survive.