Correlation between extravascular lung water index and PaO
ratio. There was a negative and weak correlation between extravascular lung water index (EVLWI) and PaO2/FiO2 (P/F) ratio in all patients except for pleural effusion with atelectasis patients (r = -0.213, P < 0.01) (A). In acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) patients (n = 207), a weak correlation between EVLWI and P/F ratio was observed (r = -0.215, P < 0.01) (B). No correlation between EVLWI and pulmonary vascular permeability index was observed in cardiogenic edema patients (n = 26; r = -0.176, P = 0.39) (C). EVLWI-0, extravascular lung water index on the day of enrollment; P/F-0, PaO2/FiO2 ratio on the day of enrollment.