抄録
In this paper statiscal analysis of eighteen hundreds and twenty-two cases of sensorineural hearing loss was performed.
Following results were obtained.
1. The incidence of the sensorineural hearing loss with unknown etiology was 52.3% of all patients with sensorineural hearing loss. Men were affected more frequently than women, in a ratio of 1.47:1.
2. The sensorineural hearing loss with unknown etiology was frequently observed in the aged group.
The bilateral hearing loss, which showed the same pattern in audiogram and gradual high tone hearing loss were frequently observed in the patients with sensorineural hearing loss with unknown etiology.
The clinical findings were more obvious with the aging.
3. The sensorineural hearing loss with unknown etiology was thought to include two different types, namely the type which was mainly observed in the young group and the other type which was observed in the aged group. The cause of two types was suspected to be different.
The sensorineural hearing loss with unknown etiology was considered to deeply related to aging.
