Relatively strong evidence for a genetic predisposition of Alzheimer's disease comes from

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Scandinavian concordance studies with twins provide the strongest evidence for a genetic predisposition of Alzheimer's disease. These studies have shown a higher concordance rate of Alzheimer's disease in identical twins compared to fraternal twins, indicating a genetic component to the development of the disease. Surveys and comparative gene mapping studies may provide some evidence, but they are not as strong as the twin studies in supporting a genetic predisposition for Alzheimer's disease. Asian family studies may provide some insight into genetic factors but are not as well-established as the twin studies.

Relatively Strong Evidence for a Genetic Predisposition of Alzheimer's Disease