Dementia Risk Factors Differ by Country, Global Study Finds
The dementia risk factors that increase the chance of cognitive decline are not the same everywhere, according to a major international study. Researchers found that each country has unique health, education, and lifestyle patterns. Therefore, experts say prevention strategies should match local needs instead of following one global approach.
The study analyzed data from more than 214,000 older adults across 14 countries and regions. Researchers examined 12 preventable or manageable risks, including high blood pressure, smoking, obesity, depression, hearing loss, and physical inactivity. The findings were presented at the Alzheimer’s Association International Conference 2026 and published in The Lancet Healthy Longevity.
Global Differences in Risk Patterns
Researchers discovered striking differences between countries. For example, low education affected most older adults in China but far fewer people in the United States. In contrast, high body weight appeared much more often in the United States than in India. However, several cardiovascular conditions, including high cholesterol and hypertension, frequently appeared together in many populations.
Smoking and alcohol use also formed a common risk pattern across different regions. Lead author Emma Nichols said these similarities could help experts develop prevention programs that target several related risks at once. As a result, healthcare systems may improve outcomes through broader interventions.
Why Local Prevention Matters
The researchers believe governments should design dementia prevention plans based on local health challenges. For instance, diabetes programs could also address blood pressure and cholesterol because these conditions often occur together. In addition, tailored strategies may improve public health more effectively than universal campaigns.
The team also stressed that dementia is not inevitable. Healthy lifestyle choices, better medical care, and improved education can lower risk over time. Future research will include countries such as Kenya and Egypt while exploring additional factors like poor sleep. These findings could support more inclusive prevention efforts worldwide and guide stronger health policies for aging populations.
