A Validation Study Comparing Existing Prediction Models of Acute Kidney Injury in Patients with Acute Heart Failure: A Multi-Institution Database Study in Taiwan
Abstract Background:Acute kidney injury (AKI) is a common complication in hospitalized acute heart failure (AHF) patients and is associated with prolonged hospitalization, increased readmission rates, and mortality. The aim of this study was to externally validate existing prediction models of AKI in patients with AHF.Methods:A total of 10,364 patients hospitalized for acute heart failure (AHF) between 2008 and 2018 were extracted from the Chang Gung Research Database and analyzed. The primary outcome of interest was AKI, defined according to the KDIGO definition. We also extended the existing prediction models to predict AKI stage 3 and dialysis. The area under the receiver operating characteristic (AUC) curve was used to assess the discrimination performance of each prediction model. Results:Five existing prediction models were externally validated, with the AUCs for AKI prediction ranging from 0.543 to 0.73. These prediction models also performed well in serious AKI event prediction, with AUCs of 0.565–0.858 for predicting AKI stage 3 and AUCs of 0.539–0.845 for predicting dialysis within 7 days. Among the five models, the Forman risk score and the prediction model reported by Wang et al. showed the most favorable discrimination and calibration performance. The Forman risk score had AUCs for discriminating AKI, AKI stage 3, and dialysis within 7 days of 0.696, 0.829, and 0.817, respectively. The Wang et al. model had AUCs for discriminating AKI, AKI stage 3, and dialysis within 7 days of 0.73, 0.858, and 0.845, respectively. Conclusion:The Forman risk score and the Wang et al. prediction model are simple and accurate tools for predicting AKI and serious AKI events in patients with AHF. They can aid clinicians in evaluating the risk of AKI in these patients and in planning and initiating adequate disease management in a timely manner.