Major Alzheimer’s group says some blood tests may be used in place of brain scans for diagnosis

A major Alzheimer’s disease medical group is recommending that specialists may use certain blood tests to help diagnose patients with cognitive impairment in lieu of more complex and invasive tests, a move that could lead more people to get treated for the devastating disease.

The Alzheimer’s Association, in its first clinical guidelines on blood biomarker testing, said Tuesday that tests that have over 90% sensitivity (ability to identify positive results) and 90% specificity (ability to identify negative results) can be used instead of current diagnostic methods like PET scans and cerebrospinal fluid tests.

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