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Table 4 Confusion matrix and correct-classification percentages obtained with the testing set

From: A straightforward approach to designing a scoring system for predicting length-of-stay of cardiac surgery patients

   Predicted class Correct classification percentage
  LOS < 5 days LOS ≥ 5 days  
Actual class LOS < 5 days 2403 492 83% (SP)
LOS ≥ 5 days 93 268 74% (SE)
Overall correct-classification percentage: 82%
  1. SP = Specificity, SE = Sensitivity.