Speed of processing training results in lower risk of dementia

Jerri D. Edwards, Huiping Xu, Daniel O. Clark, Lin T. Guey, Lesley A. Ross, Frederick W. Unverzagt

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Introduction Cognitive training improves cognitive performance and delays functional impairment, but its effects on dementia are not known. We examined whether three different types of cognitive training lowered the risk of dementia across 10 years of follow-up relative to control and if greater number of training sessions attended was associated with lower dementia risk. Methods The Advanced Cognitive Training in Vital Elderly (NCT00298558) study was a randomized controlled trial (N = 2802) among initially healthy older adults, which examined the efficacy of three cognitive training programs (memory, reasoning, or speed of processing) relative to a no-contact control condition. Up to 10 training sessions were delivered over 6 weeks with up to four sessions of booster training delivered at 11 months and a second set of up to four booster sessions at 35 months. Outcome assessments were taken immediately after intervention and at intervals over 10 years. Dementia was defined using a combination of interview- and performance-based methods. Results A total of 260 cases of dementia were identified during the follow-up. Speed training resulted in reduced risk of dementia (hazard ratio [HR] 0.71, 95% confidence interval [CI] 0.50–0.998, P =.049) compared to control, but memory and reasoning training did not (HR 0.79, 95% CI 0.57–1.11, P =.177 and HR 0.79, 95% CI 0.56–1.10, P =.163, respectively). Each additional speed training session was associated with a 10% lower hazard for dementia (unadjusted HR, 0.90; 95% CI, 0.85–0.95, P <.001). Discussion Initially, healthy older adults randomized to speed of processing cognitive training had a 29% reduction in their risk of dementia after 10 years of follow-up compared to the untreated control group.

Original languageEnglish (US)
Pages (from-to)603-611
Number of pages9
JournalAlzheimer's and Dementia: Translational Research and Clinical Interventions
Volume3
Issue number4
DOIs
StatePublished - Nov 2017

Keywords

  • Cognitive intervention
  • Cognitive training
  • Dementia
  • Nonpharmacological intervention
  • Useful field of view training

ASJC Scopus subject areas

  • Clinical Neurology
  • Psychiatry and Mental health

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