A Blood Test That May Warn of Alzheimer’s Sooner
The only way to catch Alzheimer’s early— allowing treatment to slow the progression of symptoms—is through expensive imaging or invasive tests. Now researchers have developed a blood test that they hope will spot the amyloid beta that forms brain plaque, a hallmark of the disease. Working with archived blood that had been collected between July 2000 and December 2002 from participants in a study of adults ages 50 to 75, they compared samples from 65 people who were later diagnosed with Alzheimer’s to more than 800 controls. The new test correctly identified those with the disease in almost 70 percent of the cases—and it would have done so as many as eight years before they received their diagnosis using the current tests.