That said, a&nbsp;groundbreaking 2012 study&nbsp;published in the&nbsp;New England Journal of Medicine, analyzed a rare genetic mutation found in just 500 families around the world, which would lead to Alzheimer’s before the age of 50. The study showed which tests were able to predict the outcome most accurately decades ahead of onset.
尽管如此，《新英格兰医学期刊》（New England Journal of Medicine）上发表的一篇2012年的突破性研究分析了一个只在全世界500个家族身上发生的罕见基因突变，该突变会导致50岁前罹患阿尔茨海默症。研究表明了那些测试可以在症状出现前几十年最准确地预测结果。