Older people who begin to lose both sight and hearing may be at increased risk of developing dementia.
Giffan Byung and his colleagues at Kangwon National University Hospital in South Korea studied 6,250 people between the ages of 58 and 101 in six years. At the beginning of the study, they asked each person to evaluate their ability to see and hear. Participants also took a cognitive test every two years.
The team found that 7.6% of people who reported both vision and deafness had dementia at the beginning of the study, and another 7.4% developed dementia within 6 years.
On the other hand, only 2.4% of people with vision loss or deafness only dementia At the beginning of the study, and another 2.9 percent developed it by the end of the study.
Adjusting for other factors that affect dementia, such as gender, education, and income, researchers found that people with both visual and hearing disabilities were twice as likely as those with one or no disabilities. It is estimated that dementia may develop.
The results are “very attractive,” says Jason Warren of the University College London, who was not involved in the study. However, hearing and vision loss is self-reported and not measured directly, so the findings need to be carefully considered, he adds.
Still, this may provide insight Cognitive decline Warren says people with experience of hearing and vision loss. “We see and hear in the brain. The first sign of dementia’s brain failure may be the inability to navigate the complex sensory environment of everyday life,” he says.
Byung suspects that the brains of people who have lost both hearing and sight may have a hard time compensating for the lost sensations. He says that people with vision impairment usually develop better hearing to compensate, and people with hearing impairment rely more on their vision to help. “Double sensory impairment may not be compensated, [the brain] It’s more vulnerable to dementia, “he says.
Journal reference: Neurology, DOI: 10.1212 / WNL.0000000000011845
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If people have both vision and deafness, the risk of dementia is doubled
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