| MRU | |||||
| Present | Absent | ||||
| n | % | N | % | ||
| USG | Present | 30 | 73.2 | 2 | 50.0 |
| Absent | 11 | 26.8 | 2 | 50.0 | |
| IVP | Present | 35 | 85.3 | 4 | 66.7 |
| Absent | 6 | 14.6 | 3 | 33.3 | |