Data collection
Demographic and clinical data were collected from each patient’s electronic records, including age, sex, underlying disease, indication for IMV, Pediatric Index of Mortality III (PIM-3), Pediatric Risk of Mortality IV (PRISM-4), duration of IMV, maximum oxygenation saturation index, ventilatory parameters during ERT (respiratory rate, tidal volume, dynamic compliance, MIP), need for inotrope infusion, maximum VIS score, treatments used (aminoglycoside, corticosteroid, neuromuscular blockage), length of PICU stay, and mortality. The DTi, DTe, DTF, DE, IS, and ES values were also recorded.