Diabetes Could Cause Hearing Loss?

WebMD reports that in an analysis of 13 studies people with Diabetes were twice as likely to have a hearing loss problem that those without. That in and of itself is not clear proof of cause and effect but would suggest that those with diabetes get tested regularly for hearing loss issues.

Blood Vessel Damage

It’s unknown why hearing loss is more common among people with diabetes, but most researchers believe that damage to the blood vessels is the main culprit, according to Pamela D. Parker, MD, of the A.T. Still University School of Osteopathic Medicine in Mesa, Ariz. She has studied the link between hearing loss and diabetes for years but was not involved with the new study.

Researchers believe that over time, the high blood sugar levels that characterize diabetes may damage the small blood vessels of the inner ear, making it harder to hear. Autopsy studies of diabetes patients have shown evidence of such damage.

Nearly 26 million Americans have diabetes and about 34.5 million Americans have some type of hearing loss, according to the American Diabetes Association.

A 2008 study showed that 54% of people with diabetes had at least mild hearing loss in their ability to hear high-frequency tones, compared with 32% of those with no history of diabetes. And 21% of participants with diabetes had at least mild hearing loss in their ability to hear low-to-mid frequency tones, compared with 9% of those without diabetes.

The new study suggests that people with diabetes are 2.3 times more likely to have mild hearing loss, defined as having trouble hearing words spoken in a normal voice from more than 3 feet away.

These findings were presented at a medical conference. They should be considered preliminary as they have not yet undergone the "peer review" process, in which outside experts scrutinize the data prior to publication in a medical journal.