Fig. 2

Correlation of serum ATX level with severity of ARDS. The serum ATX level showed a significant negative correlation with the PaO2/FIO2 ratio (A) and a positive correlation with the SOFA score (B) but not with the APACHE II score (C). APACHE, Acute Physiology and Chronic Health Evaluation; ARDS, acute respiratory distress syndrome; ATX, autotaxin; FIO2, fraction of inspired oxygen; PaO2, arterial oxygen tension; SOFA, Sequential Organ Failure Assessment