- A study of nearly 2,000 adults found those most at risk of cognitive decline who wore hearing aids for three years lowered their chances of cognitive decline by 48 per cent. Results provide compelling evidence that treating hearing loss is a powerful tool to protect cognitive function in later life https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(23)01406-X/fulltext 105 comments science