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What is the life expectancy of a 80 year old with dementia?

The life expectancy of an 80-year-old with dementia is a complex and highly individual matter, with research showing significant variation based on the type of dementia, age, gender, and overall health. There is no single answer to the question, "What is the life expectancy of a 80 year old with dementia?", but understanding the influencing factors can help families and caregivers plan for the future.