In what age range is probable Alzheimer's disease most commonly diagnosed?

Probable Alzheimer's disease is most commonly diagnosed in individuals within the age range of 40 to 90 years. This condition, a type of dementia, primarily affects older adults, with symptoms often emerging in the mid-60s. The risk of developing Alzheimer's disease increases significantly with age, making it a prevalent concern among older populations.

The age range of 40 to 90 years captures the typical onset age, reflecting the demographic most impacted by this neurodegenerative disorder. In contrast, the other age ranges provided encompass individuals who are usually much younger, where the incidence of Alzheimer's is markedly low. Given that Alzheimer's disease fundamentally relates to aging, it aligns with current research and clinical observations that support the recognition of this condition predominantly in older adults.