Figure 5From: A randomised controlled trial of an open lung strategy with staircase recruitment, titrated PEEP and targeted low airway pressures in patients with acute respiratory distress syndromePaO 2 /F I O 2 measured over seven days in ventilated patients (mean ± SE). There was a significant overall improvement in PaO2/FIO2 ratio in PHARLAP compared to control group patients. A = missing data analysed as random, P = 0.005. B = last observation carried forward, P = 0.03.Back to article page