| Etiology | Group A N and (%) | Group B N and (%) | Total N and (%) |
| Genetic | 4 (40) | 6 (60) | 10 (18.2) |
| Idiopathic | 14 (87.5) | 2 (12.5) | 16 (29.1) |
| Infectious | 6 (54.6) | 5 (45.4) | 11 (20) |
| Otosclerosis | 4 (80) | 1 (20) | 5 (9.1) |
| Ototoxicity | 1 (50) | 1 (50) | 2 (3.6) |
| Sudden deafness | 1 (100) | 0 (0) | 1 (1.8) |
| Trauma | 8 (80) | 2 (20) | 10 (18.2) |