Impact of cognitive training on claims-based diagnosed dementia over 20 years: evidence from the ACTIVE study.
Level 2 - randomized trial
Long-term follow-up of an individual randomized controlled trial using linked administrative claims data
PubMed 41669119 · doi:10.1002/trc2.70197
What was done
Researchers linked data from the Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE) study—a four-arm randomized controlled trial testing cognitive interventions—to Medicare claims from 1999 to 2019. The study analyzed 2,021 participants enrolled in traditional Medicare at baseline. The primary outcome was incident Alzheimer's disease and related dementias (ADRD) identified via the Chronic Conditions Warehouse claims algorithm.
What was found
Participants randomized to the speed-training arm who completed at least one booster session had a significantly lower risk of diagnosed ADRD over 20 years (HR: 0.75, 95% CI: 0.59 to 0.95). Speed-trained participants with no booster training did not experience a lower risk (HR: 1.01, 95% CI: 0.81 to 1.27). There was no main effect of memory training or reasoning training on ADRD risk.
Why it matters
This paper provides long-term follow-up evidence suggesting that adaptive speed-of-processing cognitive training, when reinforced with booster sessions, can reduce or delay clinical dementia diagnoses over a 20-year horizon.
Limits
The outcome definition relies entirely on administrative Medicare diagnostic codes rather than formal clinical or biomarker-based assessments, creating risk of outcome misclassification. The significant effect was restricted to participants receiving booster sessions rather than the entire randomized speed-training cohort, and neither reasoning nor memory training demonstrated protective effects.
Cited by
- supports A secondary analysis of the ACTIVE trial showed that older adults who completed visual processing speed training with booster sessions at 1 and 3 years had a significantly reduced risk of dementia 20 years later.