| Initial nephropathy | Number | Percentage |
| Diabetic nephropathy | 5 | 14.29 |
| Chronic tubulointerstial nephropathy | 2 | 5.71 |
| Glomerular nephropathy | 9 | 25.71 |
| Mixed nephropathy | 16 | 45.71 |
| Vascular nephropathy | 3 | 8.57 |
| TOTAL | 35 | 100.00 |