Effect of Timing of Readmission to the ICU on Mortality in Trauma Patients Requiring Critical Care.

ICU readmission is associated with increased mortality. The primary goal of our investigation was to determine the impact of early ICU readmission on mortality and to identify clinical factors which contribute to early ICU readmission in the trauma population. We retrospectively reviewed 175 patients admitted to ICU in a single, academic Level I Trauma Center from January 2019 to December 2021. Early readmission was defined as readmission within 72 hours of discharge and late readmission as after 72 hours. Early readmission mortality rate was 2.8 times higher than late readmission. Statistically significant variables in early readmission were more operations >2 hours, shorter initial length of stay in ICU, lower hematocrit and paCO2 on ICU discharge, and presence of a psychiatric diagnosis. Additional prospective research is needed to guide the development of practice guidelines that reduce frequency, morbidity, and mortality associated with ICU readmission in the trauma population.