Other collected data
ARDS
OPACITIES, ARDS, BLIND, CHRONIC RESPIRATORY DISEASE
Age, height, weight, past medical history of chronic respiratory disease, immunodepression, Sequential Organ Failure Assessment (SOFA) score [The lung opacities were independently assessed on chest X-rays by two experienced investigators blind to clinical data.The diagnosis of ARDS was performed using the criteria of the Berlin definition by an adjudication committee blind to respiratory mechanics data [Survival was assessed at day 60 after inclusion.The number of ventilator-free days at day 28 was defined as the number of days between day 1 and day 28 on which patients breathed without assistance. A value of 0 ventilator-free day was assigned for patients who died before day 28.