An Expert Delphi Consensus approach was taken to update dementia prevalence rates for Western Europe, which were then applied to UK population data. Health, social and unpaid care costs were calculated using a new version of a model of the costs and outcomes of dementia that builds on previous versions of the Personal Social Services Research Unit (PSSRU) aggregate long-term care model (Wittenberg et al., 1998, 2001) and of the PSSRU dementia care model (Comas-Herrera et al., 2007). The report estimated that the total number of people with dementia in the UK in 2015 is 850,000 and is forecast to increase to 1 million by 2025. The total cost of dementia in the UK is estimated at £26.3 billion, with an average cost of £32,250 per person, comprising £4.3 billion spent on healthcare costs, £10.3 billion spent on social care (publicly and privately funded) and £11.6 billion contributed by the work of informal carers of people with dementia.
Dementia prevalence estimates for NI for the years 2010-2013 and 2021 are readily available on the Alzheimer’s Society (UK) website.