%0 Journal Article %A Villar, Jesús %A Fernández, Cristina %A González-Martín, Jesús M %A Ferrando, Carlos %A Añón, José M %A Del Saz-Ortíz, Ana M %A Díaz-Lamas, Ana %A Bueno-González, Ana %A Fernández, Lorena %A Domínguez-Berrot, Ana M %A Peinado, Eduardo %A Andaluz-Ojeda, David %A González-Higueras, Elena %A Vidal, Anxela %A Fernández, M Mar %A Mora-Ordoñez, Juan M %A Murcia, Isabel %A Tarancón, Concepción %A Merayo, Eleuterio %A Pérez, Alba %A Romera, Miguel A %A Alba, Francisco %A Pestaña, David %A Rodríguez-Suárez, Pedro %A Fernández, Rosa L %A Steyerberg, Ewout W %A Berra, Lorenzo %A Slutsky, Arthur S %A The Spanish Initiative For Epidemiology Stratification And Therapies Of Ards Siesta Network, %T Respiratory Subsets in Patients with Moderate to Severe Acute Respiratory Distress Syndrome for Early Prediction of Death. %D 2022 %@ 2077-0383 %U http://hdl.handle.net/10668/21351 %X Introduction: In patients with acute respiratory distress syndrome (ARDS), the PaO2/FiO2 ratio at the time of ARDS diagnosis is weakly associated with mortality. We hypothesized that setting a PaO2/FiO2 threshold in 150 mm Hg at 24 h from moderate/severe ARDS diagnosis would improve predictions of death in the intensive care unit (ICU). Methods: We conducted an ancillary study in 1303 patients with moderate to severe ARDS managed with lung-protective ventilation enrolled consecutively in four prospective multicenter cohorts in a network of ICUs. The first three cohorts were pooled (n = 1000) as a testing cohort; the fourth cohort (n = 303) served as a confirmatory cohort. Based on the thresholds for PaO2/FiO2 (150 mm Hg) and positive end-expiratory pressure (PEEP) (10 cm H2O), the patients were classified into four possible subsets at baseline and at 24 h using a standardized PEEP-FiO2 approach: (I) PaO2/FiO2 ≥ 150 at PEEP %K ARDS criteria %K lung-protective ventilation %K mortality %K outcome %K prediction %K stratification %~