| GFR (ml/mn) | Patients | Percentage |
| >90 | 12 | 11.1 |
| 60 -89 | 9 | 08.3 |
| 30 - 59 | 47 | 43.5 |
| 15 - 29 | 34 | 31.5 |
| <15 | 6 | 05.6 |
| Total | 108 | 100.0 |