• Am. J. Kidney Dis. · Sep 2012

    Comparative Study

    Association of complete recovery from acute kidney injury with incident CKD stage 3 and all-cause mortality.

    • Jason Jones, John Holmen, Jennifer De Graauw, Anna Jovanovich, Sid Thornton, and Michel Chonchol.
    • Research & Evaluation, Kaiser Permanente Southern California, Pasadena, CA, USA.
    • Am. J. Kidney Dis. 2012 Sep 1;60(3):402-8.

    BackgroundThere is a gap of knowledge in the long-term outcomes of patients who have complete recovery of kidney function after an episode of acute kidney injury (AKI). We sought to determine whether complete recovery of kidney function after an episode of AKI is associated with the development of incident stage 3 chronic kidney disease (CKD) and mortality in patients with normal baseline kidney function.DesignRetrospective cohort study.Setting & Participants3,809 patients from an integrated health care delivery system who had a hospitalization between January 1, 1999, and December 31, 2009, with follow-up through March 31, 2010.PredictorAKI defined by International Classification of Diseases, Ninth Revision (ICD-9) codes and using the AKI Network (AKIN) definition, with complete recovery defined as a decrease in serum creatinine level to less than 1.10 times the baseline value.Outcomes And MeasurementsIncident stage 3 CKD persistent for 3 months and all-cause mortality.ResultsAfter a median follow-up of 2.5 years, incident stage 3 CKD occurred in 15% and 3% of those with and without AKI, respectively, with an unadjusted HR of 5.93 (95% CI, 4.49-7.84) and HR of 3.82 (95% CI, 2.81-5.19) in propensity score-stratified analyses. Deaths occurred in 35% and 24% of those with and without AKI, respectively, with an unadjusted HR of 1.46 (95% CI, 1.27-1.68). In propensity score-stratified analyses, HR decreased to 1.08 (95% CI, 0.93-1.27).LimitationsMeasurements of albuminuria were not available.ConclusionsComplete recovery of kidney function after an episode of AKI in patients with normal baseline kidney function is associated with increased risk of the development of incident stage 3 CKD, but not all-cause mortality.Copyright © 2012 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.

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