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Three Main Categories of Alzheimer’s Disease. Late-Onset AD -Occurs at age 65 or later -Most common form of the disease. Early-Onset AD -Occurs prior to age 65 -Small percentage of AD cases.
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Three Main Categories of Alzheimer’s Disease Late-Onset AD-Occurs at age 65 or later-Most common form of the disease Early-Onset AD-Occurs prior to age 65 -Small percentage of AD cases Down Syndrome AD-Occurs in Down syndrome individuals-Occurs relatively early (mid 40s-50s)-Smallest number of AD cases • Figure 1.1 from: • “The Alzheimer’s Epidemic: Searching for Causes and a Cure • by Danton H. O’Day, 2013