Changes in Sequential Organ Failure Assessment sub-scores as predictors of mortality in patients with septic acute kidney injury requiring continuous renal replacement therapy

Abstract

Patients with septic acute kidney injury (AKI) often require continuous renal replacement therapy (CRRT) , but factors that predict their prognosis have been insufficiently established. Thus, this study aimed to evaluate the associations of the Sequential Organ Failure Assessment (SOFA) score, SOFA-sub scores, and SOFA sub-score components with mortality in patients with AKI on CRRT. A total of 231 patients with AKI who required CRRT were enrolled in this retrospective, cohort study. Associations between the SOFA-sub scores on days 1 or 4 of CRRT and all-cause death within 30 days were assessed. The respiratory SOFA subscore in patients with sepsis on day 1 was associated with mortality. However, this association disappeared on day 4, and coagulation and renal SOFA-sub scores were significantly associated with mortality in patients with sepsis. These findings differed from patients without septic AKI.The baseline respiratory SOFA sub-score was significantly associated with mortality in patients with septic AKI, whereas the coagulation SOFA sub-score became a prognostic factor on day 4. The evaluation of SOFA-sub scores and changes in the factors after CRRT initiation may be useful for predicting prognosis in patients with septic AKI.