Abstract
Introduction: Apolipoprotein E (APOE) epsilon 4 is the major genetic risk factor for Alzheimer's disease (AD), but its prevalence is unclear because earlier studies did not require biomarker evidence of amyloid beta(A beta) pathology. Methods: We included 3451 A beta+ subjects (853 AD-type dementia, 1810 mild cognitive impairment, and 788 cognitively normal). Generalized estimating equation models were used to assess APOE epsilon 4 prevalence in relation to age, sex, education, and geographical location. Results: The APOE epsilon 4 prevalence was 66% in AD-type dementia, 64% in mild cognitive impairment, and 51% in cognitively normal, and it decreased with advancing age in A beta+ cognitively normal and A beta+ mild cognitive impairment (P <.05) but not in A beta+ AD dementia (P =.66). The prevalence was highest in Northern Europe but did not vary by sex or education. Discussion: The APOE E4 prevalence in AD was higher than that in previous studies, which did not require presence of A beta pathology. Furthermore, our results highlight disease heterogeneity related to age and geographical location. (C) 2018 the Alzheimer's Association. Published by Elsevier Inc. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 913-924 |
| Number of pages | 12 |
| Journal | Alzheimer's & Dementia |
| Volume | 14 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2018 |
Keywords
- APOE
- Prevalence
- Amyloid
- PET
- CSF
- Alzheimer's disease
- Mild cognitive impairment
- Subjective cognitive decline
- Age
- Sex
- Education
- Geographical location
- CEREBROSPINAL-FLUID BIOMARKERS
- MILD COGNITIVE IMPAIRMENT
- NATIONAL INSTITUTE
- APOE GENOTYPE
- ASSOCIATION WORKGROUPS
- DIAGNOSTIC GUIDELINES
- LONGITUDINAL COHORT
- GLUCOSE-METABOLISM
- CSF BIOMARKERS
- OLDER-ADULTS