Association between the shock index on admission and in-hospital mortality in the cardiac intensive care unit.

Abstract

BackgroundAn elevated shock index (SI) predicts worse outcomes in multiple clinical arenas. We aimed to determine whether the SI can aid in mortality risk stratification in unselected cardiac intensive care unit patients.MethodsWe included admissions to the Mayo Clinic from 2007 to 2015 and stratified them based on admission SI. The primary outcome was in-hospital mortality, and predictors of in-hospital mortality were analyzed using multivariable logistic regression.ResultsWe included 9,939 unique cardiac intensive care unit patients with available data for SI. Patients were grouped by SI as follows: ConclusionThe SI is a simple and universally available bedside marker that can be used at the time of admission to predict in-hospital mortality in cardiac intensive care unit patients.