FINGER: The Two-Year Trial That Changed Cognitive-Prevention Thinking
What you'll learn: What the FINGER trial tested, what it found, and why researchers consider it the pivotal proof that multidomain prevention works.
The big shift: Before FINGER, prevention trials were mostly single-intervention and mostly negative. FINGER showed the combination works — and it spawned a worldwide network of replication trials.
Reading time: ~5 minutes
- Ngandu et al., Lancet 2015: a 2-year multidomain intervention improved or maintained cognitive function vs. regular health advice in at-risk older adults.
- The intervention combined diet, exercise, cognitive training, and vascular risk monitoring — no single component was tested alone.
- FINGER established the 'multidomain' template now replicated in World-Wide FINGERS trials across dozens of countries.
The trial
The Finnish Geriatric Intervention Study to Prevent Cognitive Impairment and Disability — FINGER — enrolled older adults at elevated risk of cognitive decline and randomized them to two years of structured diet, exercise, cognitive training, and vascular risk management, or to regular health advice alone.
Published in The Lancet in 2015 by Ngandu and colleagues, the primary result was direct: the intervention group showed better cognitive outcomes than the control group across a comprehensive test battery.
Why one trial mattered so much
Prevention research had accumulated a frustrating record: single interventions — a supplement, a puzzle program, an exercise prescription — produced small or null results in trials. FINGER's hypothesis was that the biology of cognitive aging is itself multidomain, so the intervention should be too.
The positive result converted multidomain prevention from hypothesis to template. The World-Wide FINGERS network now runs adapted versions of the trial on several continents, testing whether the finding generalizes across populations and health systems.
What it means outside the clinic
FINGER's components are not exotic: movement, food, mentally engaging activity, and management of blood pressure and metabolic risk. The trial's real message is that cognitive aging responds to the same ordinary levers as cardiovascular health — applied together, consistently, over years.
It also quietly reframes what 'cognitive exercise' is. In FINGER, cognitive training was one strand of a life pattern, not a product. That framing is the one the best evidence supports.
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