Figure 3From: Non-invasive ventilation for acute hypoxemic respiratory failure: intubation rate and risk factorsKaplan-Meier estimate of survival without intubation according to presence of ARDS and its severity at presentation, stratified as no ARDS or mild ARDS (solid line) or moderate or severe ARDS (dashed line). The difference between the two groups was highly significant (P <0.0001, log-rank test). (ARDS, acute respiratory distress syndrome).Back to article page