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J Clin Endocrinol Metab. 2013 Jan;98(1):51-8. doi: 10.1210/jc.2012-2119. Epub 2012 Nov 12.

Diabetes and risk of hearing impairment in adults: a meta-analysis.

Author information

1
Department of Hematology, Endocrinology, and Metabolism, Niigata University Faculty of Medicine, 1-757 Asahimachi-dori, Chuoh-ku, Niigata, Japan 951-8510.

Abstract

CONTEXT:

Recently, several studies have investigated the relationship between diabetes and hearing impairment, but results were inconsistent.

OBJECTIVE:

Our objective was to compare the prevalence of hearing impairment between diabetic and nondiabetic adults.

DATA SOURCES:

We performed a systematic literature search using MEDLINE (1950 to May 30, 2011) and EMBASE (1974 to May 30, 2011).

STUDY SELECTION:

Cross-sectional studies were included if data on numbers of hearing-impaired and non-hearing-impaired cases with diabetes were presented. Hearing impairment was limited to that assessed by pure-tone audiometry that included at least 2 kHz of frequency range and was defined as progressive, chronic, sensorineural, or without specified cause.

DATA EXTRACTION:

Two authors independently extracted relevant data. Odd ratios (ORs) of hearing impairment related to diabetes calculated in each study were pooled with the random-effects model.

DATA SYNTHESIS:

Data were obtained from 13 eligible studies (20,194 participants and 7,377 cases). Overall pooled OR (95% confidence interval) of hearing impairment for diabetic participants compared with nondiabetic participants was 2.15 (1.72-2.68). OR was higher in younger participants (mean age, ≤60 yr) than in those over 60 yr among which the OR remained significant (2.61 and 1.58, P = 0.008). The strength of the association between diabetes and prevalence of hearing impairment was not significantly influenced by whether participants were matched for age and gender (P = 0.68) or whether participants chronically exposed to noisy environments were excluded (P = 0.19).

CONCLUSIONS:

Current meta-analysis suggests that the higher prevalence of hearing impairment in diabetic patients compared with nondiabetic patients was consistent regardless of age.

PMID:
23150692
DOI:
10.1210/jc.2012-2119
[Indexed for MEDLINE]

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