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Table 3 Prediction of subsequent hospital mortality determined on day with the best discriminating power for P. aeruginosa BSI.

From: Comparison of severity of illness scoring systems for patients with nosocomial bloodstream infection due to Pseudomonas aeruginosa

Scoring system Day with best discriminating power Cut-off point* Youden Index Sensitivity (%) Specificity (%) Overall correctness PPV (%) NPV (%)
APACHE II -1 22 0.579 70.0 87.9 26.0 84.0 76.3
SAPS II -1 33 0.509 93.3 57.6 34.0 66.7 90.5
SOFA +1 5 0.391 81.5 57.6 46.3 61.1 79.2
  1. PPV = positive predictive value, NPV = negative predictive value, * = value giving the best Youden index.