| Creatinine values (µmol/l) | GFR according to the Schwartz formula (ml/min) | Total | |||
| 15 - 29 | 30 - 59 | 60 - 89 | ≥90 | ||
| <15 | 0 | 0 | 0 | 5 | 5 |
| [15 - 31] | 0 | 0 | 0 | 85 | 85 |
| >31 | 3 | 3 | 4 | 260 | 270 |
| Total | 3 | 3 | 4 | 350 | 360 |