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Table 3 Value of PCT in predicting ARDS

From: Higher incidence of acute respiratory distress syndrome in cardiac surgical patients with elevated serum procalcitonin concentration: a prospective cohort study

 For ARDSFor moderate-to-severe ARDS
Sensitivity (95% CI)59.3% (38.8%, 77.6%)100% (63.1%, 100%)
Specificity (95% CI)81.4% (76.2%, 85.9%)79.9% (74.8%, 84.3%)
Positive predictive value (95% CI)0.242 (0.145, 0.364)0.121 (0.054, 0.225)
Negative predictive value (95% CI)0.952 (0.916, 0.976)1.0 (0.984, 1)
Positive likelihood ratio (95% CI)3.19 (2.1, 4.8)4.97 (3.9, 6.2)
Negative likelihood ratio (95% CI)0.50 (0.3, 0.8)< 0.01
  1. Using a cut-off value of 6.5 ng/mL
  2. ARDS acute respiratory distress syndrome