Stage | Description | GFR (ml/min/1.73m²) |
1 | Renal impairment with normal or increased GFR | >90 |
2 | Renal impairment with slightly reduced GFR | 60 - 90 |
3 | Moderate kidney disease | 30 - 60 |
4 | Severe kidney disease | 15 - 30 |
5 | End-stage kidney disease | <15 |