Prediction of PaO2 Values Using the PRoPERLy II Database

ERICC included patients aged 18 years or older that received ventilatory support for at least 24 hours during the first 48 hours of ICU admission at the participating ICUs. ERICC excluded patients with a tracheostomy, patients admitted for routine uncomplicated postoperative care, readmissions and patients with a terminal condition. ERICC enrolled patients during 2-months period. LUNG SAFE included patients aged 16 years or older that received invasive or noninvasive ventilation. LUNG SAFE excluded patients without informed consent. LUNG SAFE enrolled patients during a 4-week period in the winter months. PRoVENT included patients aged 18 years or older that received invasive ventilation. PRoVENT excluded patients in whom ventilation was started before the study recruitment week, patients receiving only noninvasive ventilation, and patients that were transferred to the ICU from another hospital under ventilation. PRoVENT enrolled patients during 4-week period. PRoVENT-iMiC included patients aged 18 years or older that started with invasive ventilation. They excluded patients that received only noninvasive ventilation, patients whose invasive ventilation started before the inclusion phase of the study, and patients transferred from another hospital while under ventilation. PRoVENT-iMiC enrolled patients during 4-week period.