**7. Does the risk factor for ARDS influence the patient mortality rate?**

Recently, Villar and colleagues [11] showed in a cohort of 778 patients that severe ARDS occurred in about 37.5% at ARDS diagnosis and after 24 h of ARDS onset 20.8% and moderate to severe ARDS had an overall mortality of 38.8%. They also showed that the underlying cause of ARDS influence in the mortality ratio (the mortality ratio was higher in pancreatitis and progressively lower in sepsis, pneumonia and trauma).
