Background: The commonly used recommended criteria for renal recovery are not unequivocal. This study compared\nfive different definitions of renal recovery in order to evaluate long-term outcomes of cardiac surgery associated acute\nkidney injury (CSA-AKI).\nMethods: Patients who underwent cardiac surgery between April 2009 and April 2013 were enrolled and divided into\nacute kidney injury (AKI) and non-AKI groups. The primary endpoint was 3-year major adverse events (MAEs) including\ndeath, new dialysis and progressive chronic kidney disease (CKD). We compared five criteria for complete\nrenal recovery: Acute Renal Failure Trial Network (ATN): serum creatinine (SCr) at discharge returned to within\nbaseline SCr + 0.5 mg/dL; Acute Dialysis Quality Initiative (ADQI): returned to within 50% above baseline SCr;\nPannu: returned to within 25% above baseline SCr; Kidney Disease: Improving Global Outcomes (KDIGO): eGFR\nat discharge .......................................
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