Table 1. Staging of acute kidney injury.

Stage	Serum creatinine
1	1.5 to 1.9 times baseline or≥0.3 mg/dl (≥26.5 μmol/l) increase
2	2.0 to 2.9 times baseline
3	3 times baseline or increase to ≥353.6 μmol/L in SCr or initiation of renal replacement therapy