• Lars W Andersen, Katherine M Berg, Maureen Chase, Michael N Cocchi, Joseph Massaro, Michael W Donnino, and American Heart Association's Get With The Guidelines(®)-Resuscitation Investigators.
• Department of Medicine, Regional Hospital Holstebro, Aarhus University, Holstebro, Denmark; Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA; Research Center for Emergency Medicine, Aarhus University Hospital, Aarhus, Denmark.
• Resuscitation. 2016 Aug 1; 105: 123-9.

AimTo estimate the United States' incidence and in-hospital mortality of acute respiratory events on inpatient wards and to identify factors associated with mortality.MethodsThis is an analysis of prospectively collected data from the Get With the Guidelines(®) - Resuscitation registry. We included adult patients with index acute respiratory events on inpatient wards from January 2005 to December 2013. A negative binomial regression model was used to estimate the 2012 United States incidence and a multivariable logistic regression model was used to examine time trends and characteristics associated with in-hospital mortality.ResultsThere were 13,086 index events from 320 hospitals included in the analysis. Using 2012 data, the estimated number of events in the United States was 44,551 (95%CI: 25,170-95,371). The in-hospital mortality for the entire cohort was 39.4% (95%CI: 38.5, 40.2) and rose to 82.6% (95%CI: 79.9, 85.2) for events leading to cardiac arrest. There was a decrease in in-hospital mortality over time (48.3% in 2005 to 34.5% in 2013, p<0.001). Characteristics associated with mortality included agonal breathing, hypotension and septicemia.ConclusionsAcute respiratory events on inpatient wards in the US is common with an associated in-hospital mortality of approximately 40% that has been decreasing over the past decade. Multiple factors were associated with in-hospital mortality.Copyright © 2016. Published by Elsevier Ireland Ltd.

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