New Study Finds Eliminating Risk Factors Such As Diabetes Can Prevent Dementia
A new study published in The Lancet Regional Health, Western Pacific reveals that eliminating seven core modifiable risk factors could prevent 20% to 35% of dementia cases across the Western Pacific Region. Researchers found that diabetes, hearing loss, and smoking are the primary contributors to the disease across the region, though the specific impact of these factors varies significantly by country and income level.
According to study author Claire V. Burley, the Western Pacific Region currently accounts for 20 million people living with dementia. Projections indicate this figure will rise to more than 76 million cases by 2050, representing the largest regional burden in the world. Despite these numbers, only eight of the region’s 37 countries currently maintain a national dementia action plan.
While diabetes is a consistent driver of dementia risk across all income levels in the Western Pacific, other factors fluctuate wildly: low education levels account for 7.3% of the dementia burden in lower-middle-income countries, compared to only 1.3% in wealthier nations.
Why Regional Prevention Strategies Must Vary
The research team identified that a one-size-fits-all approach to dementia prevention is ineffective due to the region’s diverse economic and social landscapes. While diabetes, hearing loss, and smoking are universal concerns, the most effective interventions depend on local priorities. For instance, data suggests that smoking reduction would yield the greatest impact in China, while increasing physical activity would be most beneficial in New Zealand.
Burley notes that the study highlights a clear gradient related to national income. In higher-income countries, depression contributes more significantly to the dementia burden, whereas lower-income countries see a greater impact from limited access to education. These findings suggest that 24 countries currently lacking a national dementia strategy now have a specific evidence base to help them prioritize targeted health interventions.
The findings underscore that dementia is not an inevitable consequence of aging. By shifting focus from global averages to country-specific data, health systems can better allocate resources toward manageable drivers like hypertension, tobacco control, and educational access, effectively tailoring prevention to the unique needs of their populations.
What May Happen Next
Future efforts are likely to move toward testing these tailored, country-specific prevention models. Burley suggests that future research should focus on generating more granular, region-specific data to refine these estimates. As countries move to implement or update their national dementia strategies, policymakers may look to prioritize investments in health systems and culturally appropriate interventions that address the specific risk factors identified in their respective territories.
Frequently Asked Questions
What are the top modifiable risk factors for dementia in the Western Pacific?
The study identifies diabetes, hearing loss, and smoking as the top contributors to dementia risk across the entire region.
How many countries in the region currently have a national dementia action plan?
Only eight of the 37 countries in the Western Pacific Region have a formal national dementia action plan in place.
Can dementia be prevented?
According to the study, a significant proportion of dementia cases are linked to modifiable factors. The researchers estimate that eliminating seven core risk factors could prevent 20% to 35% of dementia cases across the region.
Which of these risk factors do you believe should be the top priority for health policy in your own community?