Anuria (< 100 mL/day) - Urinary tract obstruction, renal artery obstruction, rapidly progressive glomerulonephritis, bilateral diffuse renal cortical necrosis
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Oliguria (100-400 mL/day) - Prerenal failure, hepatorenal syndrome
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Nonoliguria (>400 mL/day) - Acute interstitial nephritis, acute glomerulonephritis, partial obstructive nephropathy, nephrotoxic and ischemic ATN, radiocontrast-induced AKI, and rhabdomyolysis