Abstract
From 1976 to 1978, 1995 patients with a hearing problems were statistically analyzed in the Department of Otolaryngology of Kumamoto University Hospital.
One thousand one hundred and fifty-six had a sensorineural hearing loss. The causes of sensorineural hearing loss were Meniere's disease (7.1%), noise-induced deafness (7.0%), drug-induced deafness (4.3%), sudden deafness (4.8%), etc.; as for 60.5% of sensorineural hearing loss, the exact cause was unknown.
Eight hundred and thirty nine had a conductive hearing loss. The causes of conductive hearing loss were chronic otitis media (60.0%), acute otits media (13.0%), serous otitis media (19.3%), congenital malformation of external and middle ear (3.1%), etc.
