Table 1.

Neonatal AKI KDIGO definition.

Stage	Serum creatinine	UOP over 24 h
0	No change in sCr or rise <0·3 mg/dL	> 1 mL/kg/hour
1	sCr rise ≥ 0·3 mg/dL within 48 h or sCr rise ≥1·5–1·9 X reference sCra within 7 days	>0·5 and ≤ 1 mL/kg/hour
2	sCr rise ≥ 2–2·9 X reference sCra	>0·3 and ≤ 0·5 mL/kg/hour
3	sCr rise ≥3 X reference sCra or sCr ≥ 2·5 mg/dLb or Receipt of dialysis	≤ 0·3 mL/kg/hour

^aReference sCr is the lowest prior sCr measurement.

^bthis is lower than the original KDIGO definition as a sCr of 2.5 mg/dl in neonates suggests a GFR <10 ml/min/1.73m².

sCr, serum creatinine; UOP, urine output.