الفهرس 
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Abstract
Chronic Suppurative Otitis Media (CSOM) is the major cause of hearing impairment, mainly conductive type of hearing loss. The occurrence of sensorineural hearing loss (SNHL) in CSOM is controversial and the controversy is more for safe mucosal type. This study aims to assess the association between SNHL and safe mucosal CSOM and its relation to patient’s age, sex, duration of disease, and speech frequencies on Two hundred patients with unilateral mucosal type of CSOM with normal contralateral ear were included in the study in Otolaryngology, Head and Neck surgery department, Minia, Egypt.
The infected ear was taken as study ear and normal ear as control ear in all patients audiometry. All patients underwent hearing assessment by pure tone audiometry for both ears. Results were statistically compared in all patients for both study and control ears using parameters of patient’s age, sex, duration of disease and speech frequency. There were 10% of study ears with CSOM having average bone conduction threshold of all frequencies above 25 decibels which implies SNHL compared to control contralateral ears without infection. There was higher incidence of SNHL at higher speech frequencies. The incidence also increased with duration of disease. There was no difference among males and females.
Safe mucosal CSOM can cause significant SNHL and risk increases with increasing duration of disease and higher speech frequencies.