| Risk factor | Freq | Percentage |
| Catheterization | 25 | 32.9 |
| Diabetes mellitus | 31 | 40.8 |
| Immunosuppression | 4 | 5.3 |
| Recent urogenital intervention | 12 | 15.8 |
| Recurrent UTI | 11 | 14.5 |
| Renal stones | 28 | 36.8 |
| Congenital anomalies | 9 | 11.8 |