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Table 3 Performances of the PCP score

From: Validation of the Pneumocystis pneumonia score in haematology patients with acute respiratory failure

Area under the ROC curve
 AUC (95% CI) 0.535 (0.449–0.620)
 Z statistics 0.425
Youden index
 Youden index J 0.2025
 Associated criterion > 2.5
 Sensitivity 53.82
 Specificity 66.41
Using a cut-off 3.0
 Sensitivity, 95% CI 38.5% (13.9–68.4)
 Specificity, 95% CI 70.3% (61.6–78.1)
 Negative predictive value (for a PCP prevalence of 10%) 58.8%
 Positive predictive value (for a PCP prevalence of 10%) 59.8%
 Positive likelihood ratio 1.30
 Negative likelihood ratio 0.88
  1. Values are given as median (interquartile range)
  2. PCP Pneumocystis pneumonia, ROC Receiver Operating Characteristic, AUC area under the curve, CI confidence interval