Outcomes
The primary outcome was the evaluation of whether the intubation rate was significantly lower for P10 patients than for P5 patients. The secondary outcomes were compared between the two groups: a) the impact of PEEP levels on cardiorespiratory parameters over time; b) the pneumothorax rate, c) enteral feeding intolerance (defined as the need to stop enteral nutrition due to excessive gastric residual volumes and abdominal distension); d) the length of stay in the PICUs.