Table 1 |.
Definitions of AKI, CKD, and AKD1
| Acronym | Functional criteria | Structural criteria |
|---|---|---|
| AKI | Increase in SCr by ≥ 50% within 7 d, OR Increase in SCr by ≥ 0.3 mg/dL (≥26.5 μmol/l) within 48 h, OR Oliguria |
No criteria |
| CKD | GFR < 60 ml/min per 1.73 m2 for > 3 mo | Kidney damage > 3 mo |
| AKD | AKI, OR GFR < 60 ml/min per 1.73 m2 for < 3 mo, OR Decrease in GFR by ≥ 35% or increase in SCr by > 50% for < 3 mo |
Kidney damage < 3 mo |
| NKD | GFR ≥ 60 ml/min per 1.73 m2 Stable SCr without AKI/AKD/CKD |
No damage |
AKD, acute kidney diseases and disorders; AKI, acute kidney injury; CKD, chronic kidney disease; GFR, glomerular filtration rate; NKD, no kidney disease; SCr, serum creatinine.