Dementia cost 'to top 1% of GDP'

The costs associated with dementia will amount to more than 1% of the world's gross domestic product this year at $604bn (£388bn), a report says.

The World Alzheimer Report says this is more than the revenue of retail giant Wal-Mart or oil firm Exxon Mobil.

The authors say dementia poses the most significant health and social crisis of the century as its global financial burden continues to escalate. Jane Dreaper reports.