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Table 4 Performance characteristics of various cut off points of BNP or CRP, excluding mixed type edema

From: Diagnostic utility of C-reactive Protein combined with brain natriuretic peptide in acute pulmonary edema: a cross sectional study

Cut-off points Sensitivity Specificity PPV NPV Accuracy
BNP levels for CPE     
400 80.3 66.0 76.0 71.4 74.2
500 69.0 83.1 84.5 66.7 75.0
600 60.6 84.9 84.3 61.6 71.0
CRP levels for ALI/ARDS     
80 53.5 90.6 88.4 59.3 69.4
50 59.2 69.8 72.4 56.1 63.7
20 69.0 50.9 65.3 55.1 61.3
  1. Cut-off points of BNP (pg/mL), CRP (mg/L), (%)
  2. ALI: acute lung injury; ARDS: acute respiratory distress syndrome; BNP: brain natriuretic peptide; CRP: C-reactive protein; CPE: cardiogenic pulmonary edema; NPV: negative predictive value; PPV: positive predictive value