| RIFLE | |
| an acute in sCr over 7 days | |
| Risk | in sCr ≥ 1.5 × baseline |
| Injury | in sCr ≥ 2.0 × baseline |
| Failure | in sCr ≥ 3.0 × baseline or in sCr ≥ 0.5 mg/dL if baseline sCr ≥ 4.0 mg/dL |
| Loss | Complete loss of kidney function > 4 weeks |
| ESRD | End-stage renal disease > 3 months |
| AKIN | |
| an acute in sCr within 48 h | |
| Stage 1 | in sCr ≥ 1.5 - 2.0 × baseline or in sCr ≥ 0.3 mg/dL |