Collected data
Patient data were collected anonymously, once hospital admission is over and without intervening in everyday clinical decisions.
Demographic characteristics (age in months and gender).
Clinical data: respiratory rate on admission (RR), presence and characteristics of wheezing, pulmonary score (PS), SatO2/ FiO2 ratio, venous blood gas values ​​at admission (pH, PCO2, HCO3), pharmacological treatment received (bronchodilators, corticosteroids, antibiotic therapy, magnesium sulfate), type and days of ventilatory support, length of stay in the PICU, and the total length of hospital stay.
After data collection, three study groups were created: 1) ”Only HFNC”, 2) ”NIMV and HFNC” and 3) ”Only NIV”.