据老年痴呆症协会的数据，美国有大约500万人被认为患有老年痴呆症，而国际老年痴呆症协会（Alzheimer's Disease International）数据显示，全球患者约3,600万。

"The estimates suggest that in the population, up to half of Alzheimer's cases could be modifiable,' said Deborah Barnes, a psychiatry professor at UCSF who will present the results. "If we changed those risk factors…it could have this huge impact' at the population level, she said in an interview.

加州大学旧金山分校的精神病学教授黛博拉•巴尼斯(Deborah Barnes)负责演示研究结果。她接受采访时说，上述预计表明，所有人口中最多一半的老年痴呆症病患的病情可以减轻。如果我们改变这些风险因素……就有可能在群体水平上产生这种巨大的效应。

One caveat to these findings: They are based on mathematical models that predict what might happen if the assumptions on which the model was based are real. In this case, the researchers assumed that the risk factors caused Alzheimer's disease, which means that if they were modified, the rates of Alzheimer's would change as well.

关于上述结果需要提醒的一点是：它们是基于数学模型，如果这些模型所依据的前提是正确的，它们就可以预测可能发生的情况。在这项研究中，研究人员假定是这些风险因素导致了老年痴呆症，这就意味着如果这些风险因素得到修正，老年痴呆症的比例也会随之变化。

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