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Life expectancy with dementia — why there's no useful average, and what to ask instead

The average age of death for someone with dementia in the UK is approximately 83 to 85 years, though this varies based on the type of dementia and age at diagnosis. People diagnosed in their 60s typically have a longer survival trajectory than those diagnosed in their late 70s or 80s. Alzheimer's disease is associated with an average survival of 8 to 10 years from symptom onset, while vascular dementia often progresses more quickly due to associated cardiovascular disease. Dementia is now one of the leading causes of death in England and Wales. Individual variation is significant, and some people live well beyond average expectations.