| Variable | Frequency (%) |
| Age |
|
| 0 - 20 | 4 (16) |
| 21 - 40 | 16 (64) |
| 41 - 60 | 5 (20) |
| Sex |
|
| Male | 15 (60) |
| Female | 10 (40) |
| Clinical presentation |
|
| Low back pain | 20 (80) |
| Acute pyelonephritis | 4 (16) |
| Low back pain/hematuria | 1 (4) |
| Laterality of nephrectomy |
|
| Left | 15 (60) |
| Right | 10 (40) |
| Cause of ESRD |
|
| Kidney stones | 16 (64) |
| Neglected UPJO | 9 (36) |
| Presence of crossing vessels (UPJO only) |
|
| Yes | 4 (44.44) |
| No | 5 (55.56) |
| Location of stones |
|
| Lumbar ureter | 6 (37.5) |
| Renal pelvis | 10 (62.5) |
| Size of stone |
|
| ≤20 mm | 9 (36) |
| >20 mm | 16 (64) |