Fig. 2From: Prediction of non-recovery from ventilator-demanding acute respiratory failure, ARDS and death using lung damage biomarkers: data from a 1200-patient critical care randomized trialSurfactant protein D serum levels according to primary admission reason. a “Learning cohort”/northern sites. b “Validating cohort.” Boxes are medians and interquartile ranges. Whiskers are total range. Rhombuses are meansBack to article page