Population-level dementia prevention: from evidence to practice

Population prevention complements selective care

Selective multidomain interventions show modest cognitive benefits and no clear reduction in dementia incidence. Population-level measures, applied across the life course irrespective of individual risk, can prevent more cases overall through broad reach and small aggregate risk shifts.

Risk profiles and policies require alignment

Italian surveillance data estimate 39.6% avoidable dementia cases for 11 investigated risk factors. Regional risk-factor patterns differ, yet no regional prevention plan targets all factors simultaneously; therefore, uniform planning does not match epidemiological prevention potential.

Routine care integrates social determinants

Dementia prevention is integrated into routine management of aging, multimorbidity, function, and independence. Healthcare professionals address vascular, metabolic, hearing, depression, social isolation, and vision risks, identify structural barriers, and work through interprofessional pathways across health and social care.

In the geriatric seminar series “Population-level dementia prevention: from evidence to practice,” organized by Klinik Barmelweid, MD, PhD Fellow Simone Salemme presents dementia prevention as a primary prevention strategy focused on modifying risk factors before disease onset and distinguishes it clearly from secondary and tertiary prevention. He contrasts selective prevention delivered in clinical settings, such as brain health services and multidomain interventions, with population-level prevention, emphasizing Rose’s prevention paradox whereby small risk reductions across large populations may avert more cases overall than high-intensity interventions in high-risk individuals. Drawing on evidence from trials including FINGER and PreDIVA, Dr. Salemme notes that selective approaches show modest cognitive benefits but no clear reduction in dementia incidence. He further argues that dementia prevention must be understood within a life-course and societal framework, in which upstream social and structural determinants, sex differences, and inequities in access and exposure shape dementia risk and care pathways. Using Italy as a case study, he reviews analyses of national and regional prevention plans, showing partial alignment between policy and modifiable risk factors, inconsistent reporting of dementia epidemiology, and limited coverage of factors such as hearing loss, depression, and social isolation. He then presents surveillance-based estimates suggesting that 39.6% of dementia cases in Italy may be theoretically avoidable for 11 investigated risk factors, while also demonstrating marked regional variation that supports tailored rather than uniform prevention planning. Finally, Dr. Salemme outlines current European work on harmonized prevention of dementia and stroke and concludes that healthcare professionals should integrate brain health into routine care, recognize that many risks are socially patterned rather than solely individually modifiable, and build interprofessional, cross-sector pathways for effective dementia risk reduction.