Figure 1.

Measured individual values of change in esophageal pressure (ΔPes) and change in dynamic transpulmonary pressure (ΔPl) in the matched study groups at baseline and 2 hours after initiating noninvasive mechanical ventilation (NIV). No statistical difference was found when testing as an interaction for whether the change of ΔPes and ΔPl 2 hours after starting NIV was different between coronavirus disease (COVID-19) and non–COVID-19 ARF (P = 0.1 and P = 0.1, respectively). ARF = acute respiratory failure.