Aetiological diagnosis of bilateral SNHL and abnormal CT scans
| Diagnostic labels | n (%) | Abnormal CT scan (n) |
| Genetic | 51 (44) | 21 |
| Congenital syndromic | 10 (8.3) | 6 |
| Congenital non-syndromic | 5 (4.3) | 5 |
| Prenatal | 6 (5.2) | 0 |
| Perinatal | 7 (6) | 0 |
| Ototoxic | 2 (1.7) | 0 |
| Post-meningitic | 6 (5.2) | 1 |
| Post-childhood infections | 4 (3.4) | 0 |
| Post-traumatic | 2 (1.7) | 0 |
| Unknown aetiology | 23 (19.8) | 0 |
| Total | 120 | 33 (27.5%) |