Changes in a specific dietary pattern and incident dementia: A prospective cohort study.

Area of Science:

• Gerontology
• Nutritional Epidemiology
• Neuroscience

Background:

• Previous research links the Japanese diet to lower dementia risk.
• The impact of long-term changes in Japanese diet adherence on dementia risk is not well understood.

Purpose of the Study:

• To investigate the association between long-term changes in Japanese diet adherence and the risk of incident dementia.
• Focus on older Japanese individuals.

Main Methods:

• Dietary data collected via food frequency questionnaires in 1994 and 2006.
• Japanese Diet Index (JDI8) used to score adherence; changes categorized.
• Cox proportional hazards model applied to 3146 participants followed for 5.7 years for dementia incidence.

Main Results:

• A significant trend (p<0.0001) observed between JDI8 score changes and dementia risk.
• Greatly decreased adherence showed a 1.72 HR (1.13, 2.62).
• Greatly increased adherence showed a 0.62 HR (0.38, 1.02) for dementia.

Conclusions:

• Increased adherence to the Japanese diet is associated with a reduced risk of incident dementia.
• Decreased adherence to the Japanese diet is associated with an elevated risk of incident dementia.
• Dietary patterns play a crucial role in dementia prevention among older adults.