Subjective cognitive decline and rates of incident Alzheimer's disease and non–Alzheimer's disease dementia

Alzheimer's Disease Neuroimaging Initiative, DESCRIPA working group, INSIGHT-preAD study group, SCD-I working group

Research output: Contribution to journalArticleAcademicpeer-review

222 Citations (Scopus)


Introduction: In this multicenter study on subjective cognitive decline (SCD) in community-based and memory clinic settings, we assessed the (1) incidence of Alzheimer's disease (AD) and non-AD dementia and (2) determinants of progression to dementia. Methods: Eleven cohorts provided 2978 participants with SCD and 1391 controls. We estimated dementia incidence and identified risk factors using Cox proportional hazards models. Results: In SCD, incidence of dementia was 17.7 (95% Poisson confidence interval 15.2-20.3)/1000 person-years (AD: 11.5 [9.6-13.7], non-AD: 6.1 [4.7-7.7]), compared with 14.2 (11.3-17.6) in controls (AD: 10.1 [7.7-13.0], non-AD: 4.1 [2.6-6.0]). The risk of dementia was strongly increased in SCD in a memory clinic setting but less so in a community-based setting. In addition, higher age (hazard ratio 1.1 [95% confidence interval 1.1-1.1]), lower Mini–Mental State Examination (0.7 [0.66-0.8]), and apolipoprotein E ε4 (1.8 [1.3-2.5]) increased the risk of dementia. Discussion: SCD can precede both AD and non-AD dementia. Despite their younger age, individuals with SCD in a memory clinic setting have a higher risk of dementia than those in community-based cohorts.

Original languageEnglish
Pages (from-to)465-476
Number of pages12
JournalAlzheimer's and Dementia
Issue number3
Publication statusPublished - 1 Mar 2019


  • Alzheimer's disease
  • Dementia Lewy bodies
  • Dementia incidence
  • Frontotemporal dementia
  • Preclinical Alzheimer's disease
  • Subjective cognitive decline
  • Vascular dementia

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