Potentially modifiable factors contributing to outcome from acute respiratory distress syndrome: the LUNG SAFE study

John Laffey, Giacomo Bellani, Tai Pham, Eddy Fan, Fabiana Madotto, Ednan Bajwa, Laurent Brochard, Kevin Clarkson, Andres Esteban, Luciano Gattinoni, Frank van Haren, Leo Heunks, Kiyoyasu Kurahashi, Jon Laake, Anders Larsson, Daniel McAuley, Lia McNamee, Nicolas Nin, Haibo Qiu, Marco RanieriGordon Rubenfeld, B Taylor Thompson, Hermann Wrigge, Arthur Slutsky, Guy Francois, Francesca Rabboni, Sara Conti, Hektor Sula, Lordian Nunci, Alan Zazu, Christian Dellera, Carolina Insaurralde, Sanatorio Las Lomas, Risso Alejandro, Julio Daldin, Mauricio Vinzio, Ruben Fernandez, Luis Cardonnet, Lisandro Bettini, Mariano Bisso, Emilio Osman, Mariano Setten, Pablo Lovazzano, Javier Alvarez, Veronica Villar, Cesar Milstein, Norberto Pozo, Nicolas Grubissich, Gustavo Plotnikow, Daniela Vasquez, Santiago Ilutovich, Norberto Tiribelli, Ariel Chena, Carlos Pellegrini, Maria Saenz, Elisa Estenssoro, Matias Brizuela, Hernan Gianinetto, Pablo Gomez, Valeria Cerrato, Marco Bezzi, Silvina Borello, Flavia Loiacono, Adriana Fernandez, Serena Knowles, Claire Reynolds, Deborah Inskip, Jennene Miller, Jing Kong, Christina Whitehead, Shailesh Bihari

Research output: Contribution to journalArticlepeer-review

196 Citations (Scopus)


Purpose: To improve the outcome of the acute respiratory distress syndrome (ARDS), one needs to identify potentially modifiable factors associated with mortality. Methods: The large observational study to understand the global impact of severe acute respiratory failure (LUNG SAFE) was an international, multicenter, prospective cohort study of patients with severe respiratory failure, conducted in the winter of 2014 in a convenience sample of 459 ICUs from 50 countries across five continents. A pre-specified secondary aim was to examine the factors associated with outcome. Analyses were restricted to patients (93.1 %) fulfilling ARDS criteria on day 1–2 who received invasive mechanical ventilation. Results: 2377 patients were included in the analysis. Potentially modifiable factors associated with increased hospital mortality in multivariable analyses include lower PEEP, higher peak inspiratory, plateau, and driving pressures, and increased respiratory rate. The impact of tidal volume on outcome was unclear. Having fewer ICU beds was also associated with higher hospital mortality. Non-modifiable factors associated with worsened outcome from ARDS included older age, active neoplasm, hematologic neoplasm, and chronic liver failure. Severity of illness indices including lower pH, lower PaO2/FiO2 ratio, and higher non-pulmonary SOFA score were associated with poorer outcome. Of the 578 (24.3 %) patients with a limitation of life-sustaining therapies or measures decision, 498 (86.0 %) died in hospital. Factors associated with increased likelihood of limitation of life-sustaining therapies or measures decision included older age, immunosuppression, neoplasia, lower pH and increased non-pulmonary SOFA scores. Conclusions: Higher PEEP, lower peak, plateau, and driving pressures, and lower respiratory rate are associated with improved survival from ARDS. Trial Registration: ClinicalTrials.gov NCT02010073.

Original languageEnglish
Pages (from-to)1865-1876
Number of pages12
JournalIntensive Care Medicine
Issue number12
Publication statusPublished - 1 Dec 2016


  • Acute respiratory distress syndrome
  • Driving pressure
  • Patient outcome
  • Peak inspiratory pressure
  • Positive end-expiratory pressure


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