Muhammad Farooq, Ashfaque Ahmed, Zafar Mehmood, Abdul Waheed.
Frequency of Sensory Neural Hearing Loss (SNHL) in Type 1 and Type 2 Diabetic Patients.
Pak J Otolaryngol Jan ;29(3):87-9.

OBJECTIVE: To observe the frequency of sensory neuronal hearing loss in type 1 and type 2 diabetic patients and to find out relationship between severity of hearing loss and glycemic control STUDY TYPE : Descriptive Cross sectional. PLACE & DURATION: This study was conducted at Sindh Govt. lyari General Hospital Karachi for 6 months. MATERIAL AND METHOD: This study is done in secondary care hospital of Karachi for duration of 6 months. The age limit was 12 -60 years. The exclusion criteria were noise exposure, alcoholism, smoking, inherited or anatomical inner or middle ear problems, ototoxic drug and conductive deafness. Those included in the study went through series of laboratory tests specially fasting blood glucose (FBG) and HbA1C. The audiometry was done and severity of SNHL was classified accordingly. RESULTS: Out of 110 patients, 15.5% (n=17) were type 1 diabetic while 84.5% (n=93) were type 2 diabetic. The SNHL was 79% (n=87) with no significant difference in type 1 and type 2 diabetic patients regarding severity of SNHL. The mean FBG was 148±13.25 mg/dl and mean HbA1C was 8.12±1.14. There was strong association between increase in FBG level and raised HbA1C and severity of SNHL. The duration of diabetes also has significant correlation with severity of SNHL. CONCLUSION: The SNHL is the disease of old age but in diabetic patients it appears early. The study emphasized to do audiometry test for all patients with diabetes to recognize this complication.

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