HearingLoss is the largest modifiable risk factor for developing dementia, exceeding that of smoking, high blood pressure, lack of exercise and social isolation.
Every now and then I write a column as much to push myself to act as to inform and motivate my readers. What follows is a prime example.,” I summarized the current state of knowledge about the myriad health-damaging effects linked to untreated hearing loss, a problem that afflicts nearly 38 million Americans and, according to two huge recent studies, increases the risk of dementia, depression, falls and even cardiovascular diseases.
That means a diminished ability to get top scores on standardized tests of brain function, like matching numbers with symbols within a specified time period. But while you may never need or want to do that, you most likely do want to maximize and maintain cognitive function: your ability to think clearly, plan rationally and remember accurately, especially as you get older.
The National Institute on Aging is currently sponsoring a trial of 997 people aged 70 to 84 with mild to moderate hearing loss to determine how effective hearing aids can be in diminishing the risk of dementia. Results of the trial, called Aging and Cognitive Health Evaluation in Elders, are expected in 2022., gleaned from among 6,451 people age 50 or older, suggest that any degree of hearing loss can take a toll.
In fact, the researchers demonstrated that the biggest drop in cognitive ability occurs at the slightest level of hearing loss — a decline from zero to the “normal” level of 25 decibels, with smaller cognitive losses occurring when hearing deficits rise from 25 to 50 decibels. “In people with very good hearing, we need to be aware of how early changes in hearing affect the brain,” said Dr. Frank Lin, director of the Cochlear Center for Hearing and Public Health at the Johns Hopkins Bloomberg School of Public Health. “Without a doubt, the most important measure to preserve hearing is protection against noise.”
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