Table 2.

AKIN criteria

Definition	1. Increased in SCr of ≥ 0.3 mg/dl (48 h) 2. sCr changes ≥ 1.5 × baseline (48 h) 3. UO < 0.5 ml/kg/h × 6 h
	sCr criteria	UO criteria
Stage 1	Increased in sCr of ≥ 0.3 mg/dl or increase to 1.5–2.0 × baseline	UO < 0.5 ml/kg/h × 6 h
Stage 2	Increase in sCr to 2.0–3.0 × baseline	UO < 0.5 ml/kg/h × 12 h
Stage 3	Increase in sCr > 3.0 × baseline or sCr ≥ 4.0 mg/dl with an acute rise of at least 0.5 mg/dl or Initiation of RRT	UO < 0.3 ml/kg/h × 24 h or anuria × 12 h

sCr serum creatinine, UO urine output, RRT renal replacement therapy