| Primary disease | No. Patients, n (%) |
| Hypertensive nephropathy | 49 (51.04) |
| Diabetic nephropathy | 29 (30.20) |
| Chronic glomerulonephritis | 5 (5.20) |
| Obstructive kidney disease | 8 (8.33) |
| Renal cysts | 2 (2.08) |
| Nephrotic syndrome | 2 (2.08) |
| IGA nephropathy | 1 (1.04) |