Renal Injury | Description |
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Acute kidney injury (AKI) | Defined according to changes in serum creatinine and urine output, and described as stages 1, 2 and 3 |
Recurrent kidney injury (RKI) | An episode of repeated renal injury following recovery of the index case |
Acute kidney disease (AKD) | Describes the transition between the acute and chronic states (day 7 post-AKI to day 90) |
Chronic kidney disease (CKD) | Abnormalities of kidney structure or function for >3 months, with implications for health |