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Annals of Intensive Care
Fig. 5 | Annals of Intensive Care

Fig. 5

From: Nucleated red blood cells as predictors of mortality in patients with acute respiratory distress syndrome (ARDS): an observational study

Fig. 5

a Oxygenation index (OI), b PaO2/FiO2 ratio and c SOFA II score in ARDS patients grouped by the NRBC cutoff level of 220 NRBC/µl from ROC analysis in the first consecutive 7 days on the ICU. Open circles = ARDS patients below the threshold of 220 NRBC/µl; filled squares = ARDS patients above the threshold of 220 NRBC/µl; data are presented as mean ± standard deviation; Multivariate nonparametric analysis for longitudinal data, indicated p value for comparison between the two groups over time; n = 404. PaO 2 arterial partial pressure of oxygen; FiO 2 inspiratory fraction of oxygen; OI oxygenation index, calculated as FiO2/PaO2 * Pmean; Pmean mean airway pressure; SOFA Sequential Organ Failure Assessment; ICU intensive care unit; NRBC nucleated red blood cells

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