Complex interactions underlie racial disparity in the risk of developing Alzheimer's disease dementia

Chengjie Xiong, Jingqin Luo, Dean Coble, Folasade Agboola, Walter Kukull, John C. Morris

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Introduction: We aim to determine racial disparities and their modifying factors in risk for Alzheimer's disease (AD) dementia among cognitively normal individuals 65 years or older. Methods: Longitudinal data from the National Alzheimer's Coordinating Center Uniform Data Set on 1229 African Americans (AAs) and 6679 whites were analyzed for the risk of AD using competing risk models with death as a competing event. Results: Major AD risk factors modified racial differences which, when statistically significant, occurred only with older age among APOE ε4 negative individuals, but also with younger age among APOE ε4 positive individuals. The racial differences favored AAs among individuals with body mass index (BMI) < 30, but whites among individuals with a high BMI (≥ 30), and were additionally modified by sex, education, hypertension, and smoking status. Conclusions: The presence, direction, and relative magnitude of racial disparity for AD represent an interactive function of major AD and cerebrovascular risk factors.

Original languageEnglish
Pages (from-to)589-597
Number of pages9
JournalAlzheimer's and Dementia
Volume16
Issue number4
DOIs
StatePublished - Apr 1 2020

Keywords

  • competing risk survival model
  • interactions
  • racial disparity
  • risk of Alzheimer's disease

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