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Structured vs Self-Guided Multidomain Lifestyle Interventions for Global Cognitive Function: The US POINTER

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A structured lifestyle intervention significantly improved global cognition in older adults at risk of dementia compared to a self-guided approach. This finding highlights the benefits of higher-intensity programs for cognitive health.

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Area of Science:

  • Gerontology and Cognitive Neuroscience
  • Public Health and Preventive Medicine

Background:

  • Cognitive decline and dementia pose a significant public health challenge.
  • Nonpharmacological interventions offer a promising, safe, and accessible strategy for prevention.
  • Lifestyle modifications targeting modifiable risk factors are key to maintaining cognitive function.

Purpose of the Study:

  • To compare the 2-year effects of structured versus self-guided lifestyle interventions on cognitive trajectory.
  • To evaluate cognitive changes in older adults identified as being at risk for cognitive decline and dementia.

Main Methods:

  • A single-blind, multicenter randomized clinical trial involving 2111 participants aged 60-79.
  • Participants were randomized to either a structured or self-guided intervention promoting physical activity, cognitive engagement, healthy diet, and social interaction.
  • Cognitive function was assessed using a composite measure of executive function, episodic memory, and processing speed over two years.

Main Results:

  • Both interventions led to an increase in global cognitive scores over two years.
  • The structured intervention group demonstrated a statistically significant greater mean annual rate of cognitive increase (0.029 SD) compared to the self-guided group (P=.008).
  • Benefits were consistent across APOE ε4 carriers and noncarriers, and appeared more pronounced in individuals with lower baseline cognition.

Conclusions:

  • A structured, higher-intensity lifestyle intervention yields greater benefits for global cognition in at-risk older adults than a self-guided approach.
  • These findings support the clinical relevance of structured lifestyle programs in mitigating cognitive decline.
  • Further research on functional outcomes and biomarkers is warranted to confirm long-term sustainability.