Called PROTECT, the study builds on recent findings by the Lancet Commission on Dementia Prevention, Intervention and Care, which indicated that hearing loss is a key risk factor for dementia.
According to the latest research, which involved 25,000 people aged 50 years and above, a hearing aid can protect the brain and potentially reduce dementia risk.
The study involved annual cognitive tests over two years in a group of people who wore hearing aids and another group who did not.
