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Citation

Walker H, De Souza N, Hapca S, Witham MD & Bell S (2021) Effect of multiple episodes of acute kidney injury on mortality: an observational study. Clinical Kidney Journal, 14 (2), pp. 696-703. https://doi.org/10.1093/ckj/sfz199

Abstract
Background Patients who survive an episode of acute kidney injury (AKI) are more likely to have further episodes of AKI. AKI is associated with increased mortality, with a further increase with recurrent episodes. It is not clear whether this is due to AKI or as a result of other patient characteristics. The aim of this study was to establish whether recurrence of AKI is an independent risk factor for mortality or if excess mortality is explained by other factors. Methods This observational cohort study included adult people from the Tayside region of Scotland, with an episode of AKI between 1 January 2009 and 31 December 2009. AKI was defined using the creatinine-based Kidney Disease: Improving Global Outcomes definition. Associations between recurrent AKI and mortality were examined using a Cox proportional hazards model. Results Survival was worse in the group identified to have recurrent AKI compared with those with a single episode of AKI [hazard ratio = 1.49, 95% confidence interval (CI) 1.37–1.63; P?

Keywords
acute kidney injury; mortality; recurrent acute kidney injury; risk factors; survival

Journal
Clinical Kidney Journal: Volume 14, Issue 2

• Published version