Diabetici and hearing loss
Japanese researchers have studied the connection between diabetes and hearing loss. They discovered a link during this research which was executed with people from the US, Asia, Australia and Brasil. Hearing loss occurs twice as much to people with diabetes.
Reseach points out that people with bad poor sugar control often suffer from hearing loss at young age. Proven is, that there is a correlation but this doensn’t say anything about cause-consequence effect.
Source: http://health.usnews.com