| Stage | Descripion | eGFR ml/min/1.73 m2 | Cases |
| 1 | Kidney damage with normal or ↑eGFR | ≥90 | 26 |
| 2 | Kidney damage with mild ↓eGFR | 60 - 89 | 93 |
| 3 | Moderate ↓eGFR | 30 - 59 | 45 |
| 4 | Severe ↓eGFR | 15 - 29 | 5 |
| 5 | Kidney failure ↓eGFR | <15 (or dialysis) | 0 |