Abstract 23: Incidence of Adult In-Hospital Cardiac Arrest in the United States

Introduction: Current incidence estimates of in-hospital cardiac arrest in the United States are based on data from more than a decade ago, with an estimated 200,000 adult cases per year. The aim of this study was to estimate the contemporary incidence of in-hospital cardiac arrest in adult patients, which may better inform the public health impact of in-hospital cardiac arrest in the United States. Methods: Using the Get With The Guidelines®-Resuscitation (GWTG-R) registry, we developed a negative binomial regression model to estimate the incidence of index in-hospital cardiac arrests in adult patients (>18 years) between 2008 and 2016 based on hospital-level characteristics. The model coefficients were then applied to all United States hospitals, using data from the American Hospital Association Annual Survey, to obtain national incidence estimates. Hospitals only providing care to pediatric patients were excluded from the analysis. Additional analyses were performed including both index and recurrent events. Results: There were 154,421 index cardiac arrests from 388 hospitals registered in the GWTG-R registry. A total of 6,808 hospitals were available in the American Hospital Association database, of which 6,285 hospitals provided care to adult patients. The average annual incidence was estimated to be 283,700 in-hospital cardiac arrests. When including both index and recurrent cardiac arrests, the average annual incidence was estimated to 344,800 cases. Conclusions: Our analysis indicates that there are approximately 280,000 adult patients with in-hospital cardiac arrests per year in the United States. This estimate provides the contemporary annual incidence of the burden from in-hospital cardiac arrest in the United States.