The age‐standardised prevalence of AD showed an increasing trend from 1.7% to 3.0% between 1997 and 2004, but then showed a decreasing trend to 2.5% in 2012, and started to increase again to 4.9% in 2016 ( P for trend <0.05).
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Secular trends in the prevalence of dementia based on a community-based complete enumeration in Japan: the Nakayama Study.
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