| Clinics characteristics | IU − n = 720(%) | IU + n = 180(%) | P-value |
| Mean age (years) | 8.32 | 12.67 | 0.0000 |
| Bladder neck statut |
|
| 0.000 |
| Normal | 524 (72.8) | 57 (31.7) |
|
| Partial destruction | 142 (19.7) | 84 (46.7) |
|
| Total destruction | 51 (7.1) | 38 (21.1) |
|
| Urethra statut |
|
| 0.000 |
| Normal | 545 (75.7) | 2 (1.1) |
|
| Partial destruction | 136 (18.9%) | 65 (36.1) |
|
| Total destruction | 8 (1.1) | 81 (45) |
|
| Type of fistula* |
|
| 0.000 |
| Type 1 | 312 (43.3) | 14 (7.8) |
|
| Type 2 | 271 (37.6) | 74 (41.1) |
|
| Type 3 | 131 (18.2) | 89 (49.4) |
|