08/18/2021
🦻Approximately 30 percent of adults aged 65 and older and 55 percent older than 80 years show some degree of hearing loss. The number of people affected by age-related hearing loss is estimated to grow to 580 million worldwide by 2050. In 2015, 47 million people worldwide were living with dementia, amassing a global cost of $818 billion, according to a study published in The Lancet Commissions (Lancet. 2017 Dec 16;390[10113]:2673-2734). By 2050, when the proportion of people older than 60 years will double, accounting for 21 percent of the projected global population, the number of those living with dementia is expected to triple, costing nearly $2 trillion. The risk of developing dementia doubles for older adults with mild hearing loss, and triples for those with moderate hearing loss. And for those with severe hearing loss, the risk is five times that of someone who does not suffer hearing loss. Notably, the Lancet study also found that of nine potential risk factors for developing dementia, hearing loss was the highest at nine percent.
🧠 In addition, recent research has found that shrinkage of brain tissue is fast-tracked for those with hearing loss, with accelerated rates of brain atrophy compared to those with normal hearing [citation here]. Overall, those with hearing loss were found to have lost more than an additional cubic centimeter of brain tissue each year compared with those without impaired hearing.-Journals.LWW
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