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Public Health
Jose M Aravena1,2, Hugo Castro3,4, Ronald Poblete3
1Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Region Metropolitana, Chile.
Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 23, 2025
Summary
Nudge-based interventions significantly improved healthy brain behaviors and dementia prevention knowledge among older adults. Healthcare providers also increased dementia prevention discussions and risk management recommendations.
Area of Science:
- Gerontology
- Public Health
- Neurology
Background:
- Healthy lifestyles reduce dementia risk, yet dementia prevention is rarely discussed with healthcare providers.
- Nudge-based interventions show promise in clinical practice but haven't been tested for dementia prevention.
- This study aimed to evaluate nudge-based interventions for dementia prevention practices.
Purpose of the Study:
- To assess the effectiveness of a nudge-based intervention in promoting healthy brain behaviors for dementia prevention.
- To evaluate changes in patient knowledge and healthcare provider practices regarding dementia prevention.
- To determine the impact on cognitive scores and risk factor management.
Main Methods:
- A pragmatic cluster-randomized trial involving 210 participants aged 60+ with cognitive impairment but no dementia in Chilean senior centers.
- Intervention centers received usual care plus nudge-based materials (posters, brochures, webpage) encouraging Alzheimer's Disease (AD) preventive practices.
- Usual care included physical, social, and cognitive activities, plus general dementia talks for healthcare providers.
Main Results:
- The intervention group showed significant improvements in composite healthy brain behaviors scores (physical, social, dietary, cardiovascular).
- Participants in the intervention group reported increased knowledge of dementia prevention methods and more discussions with healthcare providers.
- Healthcare providers in the intervention group increased risk factor management recommendations, though global cognitive scores did not differ.
Conclusions:
- Nudge-based information, integrated with clinical practice, effectively promotes healthy brain behaviors for dementia prevention.
- The intervention positively influenced both patient practices and healthcare provider engagement in dementia prevention discussions.
- While not directly improving global cognition, the intervention showed promise in reducing cases with moderate cognitive impairment.
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