How many years after the onset of symptoms does early-onset Alzheimer disease typically lead to death?

Early-onset Alzheimer's disease typically leads to death approximately 10 to 15 years after the onset of symptoms. This timeframe is supported by research indicating that individuals diagnosed with early-onset Alzheimer's, which occurs before the age of 65, generally experience a more rapid progression of the disease compared to those with late-onset Alzheimer's. Over time, the condition leads to severe cognitive decline, loss of bodily functions, and ultimately death. The 10 to 15-year timeline encompasses the typical disease progression and reflects the clinical understanding of the disease's impact on life expectancy.