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What is the average life expectancy after Alzheimer's diagnosis?

While the average life expectancy after an Alzheimer's diagnosis is often cited as 4 to 8 years, some individuals live much longer, with lifespans extending to 20 years or more. This wide variation makes providing a definitive prognosis challenging, as many factors influence the outcome for each person. Understanding **what is the average life expectancy after Alzheimer's diagnosis** requires looking beyond a single number to the individual circumstances.