Multivariate analyses for the outcome of critical ill patients with ICU readmission

Abstract

Objective To investigate the outcome of the critical ill patients readmitted to ICU and factors from the first ICU admission impacting on the outcome of patients after ICU readmission. Method A total of 2 459 patients admitted to ICU from 14th, Jan, 2009 to 29th, Dec, 2011 were enrolled for study. Patients were classified into non-readmission group (A) and readmission group (B). According to our ICU routine and clinical guideline, attending intensivists were responsible for all the ICU treatment. Results ICU readmission was not only related to prolonged hospital stay or ICU stay, but also independently associated with a lower ICU survival rate [HR =2.246, 95%CI 1.27-3.973 , P =0.005 ]. In the further analyses of Group B, that high APACHE Ⅱ score was found at the first admission and non-surgical patients were independently related to higher ICU mortality. Conclusion ICU readmission was associated with low ICU survival rate. The influence of ICU readmission on ICU outcome was affected by clinical factors at the first ICU admission, including APACHE Ⅱ score and surgery. Key words: Readmission to ICU; Critical ill patients; Outcome