Fig.Ā 5From: RETRACTED ARTICLE: Serum sphingosine-1-phosphate levels and Sphingosine-1-Phosphate gene polymorphisms in acute respiratory distress syndrome: a multicenter prospective studyThe ROC curve depicted an improvement in the discriminatory ability of the severity categories based on the APACHE II score (a) and PF ratio (b) with the addition of S1P level to the model. The AUC increased from 0.73 to 0.80 (Pā>ā0.05) and 0.55 to 0.77 (Pā<ā0.01), respectively. ROC receiver operating characteristic, APACHE II Acute Physiology and Chronic Health Evaluation II, PF PaO2/FiO2, S1P sphingosine-1-phosphate, AUC areas under the curveBack to article page