Fig. 2

Kaplan-Meier estimates of cumulative probabilities of 28-day survival in propensity-score matched cohort. PaO2, Partial pressure of oxygen in arterial blood; HR Hazard ratio; CI Confidence interval
Kaplan-Meier estimates of cumulative probabilities of 28-day survival in propensity-score matched cohort. PaO2, Partial pressure of oxygen in arterial blood; HR Hazard ratio; CI Confidence interval