Table 1.
Etiologies of hearing loss*
| Absolute (n) |
Proportion (%) |
|
|---|---|---|
| Etiology of hearing loss | 1669 | 100% |
| Known | 674 | 40.4% |
| Unknown | 995 | 59.6% |
| Documented etiologies | 646 | 100% |
| Age related hearing loss | 137 | 21.2% |
| Genetic | 111 | 17.2% |
| Infection | 110 | 17.0% |
| Meniere’s disease | 78 | 12.1% |
| Traumatic | 63 | 9.8% |
| Syndromic | 46 | 7.1% |
| Ototoxic | 37 | 5.7% |
| Vestibular schwannoma | 32 | 5.0% |
| Inner-ear malformation | 27 | 4.2% |
| Auditory nerve agenesis or abnormality | 3 | 0.5% |
| Malformation of central hearing pathways | 2 | 0.3% |
*Documented only for a part of the cases