Lifestyle changes could prevent a third of dementia cases, report suggests

Researchers admit prevention estimate is a 'best-case scenario', but stress that action can be taken to reduce dementia risk

More than a third of dementia cases might be avoided by tackling aspects of lifestyle including education, exercise, blood pressure and hearing, a new report suggests.

Approximately 45 million people worldwide were thought to be living with dementia in 2015, at an estimated cost of $818bn.