Figure 5. PD-L1 gene expression is associated with ventilator-free days (VFDs) in subjects with acute respiratory distress syndrome (ARDS).

Alveolar macrophages (AMs) were isolated <48 hours after the development of ARDS by negative selection in the ARDS-AMGE sample set. High VFDs indicate VFD ≥ 18 (n = 15) and Low VFDs indicate VFD < 18 (n = 15). mRNA normalized log₂ probe intensity for each transcript is expressed as individual values and median ± interquartile range (IQR) for each group. For each gene, comparisons were made with a Mann-Whitney U test. ***P < 0.001.