The primary objective is to quantify the caloric and protein intake in adult participants with acute respiratory failure who start a noninvasive ventilation treatment. The main question is:
\- Are participants meeting their caloric and protein target during noninvasive ventilation treatment? Participants will complete a five-day food diary collection starting from the initiation of noninvasive ventilation treatment.
Age of 18 years or more
Hospitalization in the participant ordinary wards, intermediate care units and intensive care unit at the Maggiore della Carità University Hospital, Novara, Italy
Admission for acute respiratory failure of any cause requiring noninvasive ventilation treatment within 24 hours from hospital admission
Palliative noninvasive ventilation treatment
Contraindication to oral nutrition from hospital admission
Patients admitted for surgical or gastroenterological diagnosis
Severe immunocompromised patients or patients undergoing therapies contraindicating oral nutrition