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| Stage | Serum Creatinine |
|---|---|
| 1 | 1.5–1.9 times baseline or ≥0.3 mg dL−1 increase within 72 h after ICU admission |
| 2 | 2.0–2.9 times baseline within 72 h after ICU admission |
| 3 | 3.0 times baseline or increase in serum creatinine to ≥4.0 mg dL−1 or initiation of RRT within 72 h after ICU admission |
KDIGO, Kidney Disease: Improving Global Outcomes; RRT, Renal Replacement Therapy.
