Table 2.

Etiology of hearing loss.

Etiology	N	(%)
Acoustic neuroma	5	(0.9)
Bacterial infection	9	(1.7)
Cholesteatoma	5	(0.9)
Chronic otitis	14	(2.6)
Congenital atresia	4	(0.7)
Familial	33	(6.1)
Large vestibular aqueduct	3	(0.5)
Measles	5	(0.9)
Meniere’s syndrome	21	(3.9)
Meningitis	16	(2.9)
Mondini syndrome	1	(0.2)
Mumps	3	(0.5)
Noise exposure	8	(1.5)
Otosclerosis	34	(6.3)
Ototoxic drugs	25	(4.6)
Rubella	6	(1.1)
Sudden deafness	44	(8.1)
Trauma	15	(2.8)
Viral infection	4	(0.7)
Unknown	232	(42.6)
Other	56	(10.3)