Figure 2

Receiver operating characteristics curve (AUC) analyses of brain natriuretic peptide (BNP), C-reactive protein (CRP), and BNP combined with CRP in discriminating cardiogenic pulmonary edema (CPE) from acute lung injury/acute respiratory distress syndrome (ALI/ARDS), excluding the mixed type of pulmonary edema. CRP levels were converted to the negative values, because lower CRP levels were expected to be more common in CPE patients. p < 0.001 compared BNP alone with combination BNP and CRP; p = 0.030 compared CRP alone with BNP and CRP.