Table 3.

Neonatal acute kidney injury KDIGO classification (21).

Stage	Serum creatinine	Urine output
0	No change in sCr or rise <0.3 mg/dl	> 1 ml/kg/h
1	sCr rise ≥0.3 mg/dl within 48 h or sCr rise ≥1.5–1.9× reference sCra within 7 days	> 0.5 ml/kg/h and ≤ 1 ml/kg/h
2	sCr rise ≥2–2.9× reference sCra	>0.3 ml/kg/h and ≤ 0.5 ml/kg/h
3	sCr rise ≥3× reference SCra or sCr ≥2.5 mg/dlb or receipt of dialysis	≤ 0.3 ml/kg/h

Differences between the proposed neonatal AKI definition and KDIGO include:

^aReference sCr will be defined as the lowest previous sCr value.

^bsCr value of 2.5 mg/dl represents less than 10 ml/min/1.73m².