Blood tests could eventually be used earlier, allowing people who were beginning to have mild memory issues to learn whether they would develop Alzheimer’s or instead had another condition that might be less aggressive or fast-moving, Dr. Weiner said.
And, Dr. Tanzi said, in the future blood tests might be given to people without any impairment, perhaps as initial screening tools to be followed with PET scans if worrisome levels of biomarkers were detected.
“It has the promise to make early detection of the disease possible, before we have symptoms,” Dr. Tanzi said, something the field would only recommend for clinical use if there were effective ways to prevent or treat Alzheimer’s.
Dr. Hansson said his lab was studying whether the test could predict dementia in people with no impairments or those with mild memory problems.
The test in the JAMA study used a method called an immunoassay to detect