What is the typical life expectancy for a person diagnosed with advanced-stage Alzheimer's disease?

The typical life expectancy for a person diagnosed with advanced-stage Alzheimer's disease is generally considered to be between 3 to 10 years after diagnosis. This range accounts for the progression of the disease and the various factors that influence longevity, such as individual health conditions, the presence of co-morbidities, and access to medical care.

In advanced stages, individuals often experience significant cognitive decline and functional impairment, which can lead to complications such as infections, malnutrition, and other health issues that can shorten life expectancy. While some may live longer, reaching beyond the 10-year mark, this is less common, especially at advanced stages. The majority of studies and clinical observations support the 3 to 10-year estimate, making it a more accurate reflection of life expectancy within this context.