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People who are hard of hearing have increased odds of developing dementia as they age, according to a U.S. study.
Scientists found those with mild hearing loss had nearly twice the chance of developing dementia compared to people with normal hearing, even after ruling out the influence of age and other factors. The risk increased three-fold for those with moderate hearing loss, and five-fold for severe impairment. However, scientists are not sure whether hearing loss and a decline in mental function go hand in hand, or whether deafness isolates a person, which in turn increases their risk of dementia.
The study led by Johns Hopkins University surgeon Frank Lin, followed more than 600 men and women aged 36 to 90 over an average of 12 years. All had a hearing test done at the start of the study, but none had dementia at that point. Overall, nine per cent of the participants developed some kind of dementia during the study, which was published in the Archives of Neurology, most commonly Alzheimer's disease. Colleagues showed that the worse the participants' hearing, the greater their dementia risk. Read more: dailymail.co.uk
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