Figure 1.

Differences in acute respiratory distress syndrome severity, management and outcomes across geo-economic groups. *, at day 1; ¶, defined as tidal volume ≤8 mL/kg of predicted body weight and airway plateau pressure ≤30 cmH₂O; §, in first 48 hours from ARDS onset; †, within 90 days from acute respiratory hypoxemic respiratory failure.