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Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women
INTRODUCTION: Racial disparities in Alzheimer's disease (AD) and all‐cause dementia (DEMENTIA) incidence may exist differentially among men and women, with unknown mechanisms. METHODS: A retrospective cohort study examining all‐cause and AD dementia incidence was conducted linking Third Nationa...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8924949/ https://www.ncbi.nlm.nih.gov/pubmed/35317081 http://dx.doi.org/10.1002/trc2.12275 |
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author | Beydoun, May A. Weiss, Jordan Beydoun, Hind A. Fanelli‐Kuczmarski, Marie T. Hossain, Sharmin El‐Hajj, Ziad W. Evans, Michele K. Zonderman, Alan B. |
author_facet | Beydoun, May A. Weiss, Jordan Beydoun, Hind A. Fanelli‐Kuczmarski, Marie T. Hossain, Sharmin El‐Hajj, Ziad W. Evans, Michele K. Zonderman, Alan B. |
author_sort | Beydoun, May A. |
collection | PubMed |
description | INTRODUCTION: Racial disparities in Alzheimer's disease (AD) and all‐cause dementia (DEMENTIA) incidence may exist differentially among men and women, with unknown mechanisms. METHODS: A retrospective cohort study examining all‐cause and AD dementia incidence was conducted linking Third National Health and Nutrition Examination Survey (NHANES III) to Centers for Medicare & Medicaid Services Medicare data over ≤26 years of follow‐up (1988 to 2014). Cox regression and generalized structural equation models (GSEMs) were constructed among men and women ≥60 years of age at baseline (N = 4592). Outcomes included onset ages of all‐cause and AD dementia, whereas the main exposures were race/ethnicity contrasts (RACE_ETHN). Potential mediators) included socio‐economic status (SES), lifestyle factors (dietary quality [DIET] nutritional biomarkers [NUTR], physical activity [PA], social support [SS], alcohol [ALCOHOL], poor health [or HEALTH], poor cognitive performance [or COGN]. In addition to RACE_ETHN, the following were exogenous covariates in the GSEM and potential confounders in Cox models: age, sex, urban‐rural, household size, and marital status. RESULTS: Non‐Hispanic Black (NHB) women had a higher risk of DEMENTIA versus non‐Hispanic White (NHW) women in GSEM, consistent with Cox models (age‐adjusted model: hazard ratio [HR] = 1.34, 95% confidence interval [CI]: 1.10 to 1.61). The total effect of this RACE_ETHN contrast in women was explained by four main pathways: (1) RACE_ETHN→ poor cognitive performance (COGN, +) → DEMENTIA (+); (2) RACE_ETHN → SES (−) → COGN (−) → DEMENTIA (+); (3) RACE_ETHN → SES (−) → physical activity (PA, +) → COGN (−) → DEMENTIA (+); and (4) RACE_ETHN → SES (−) → DIET (+) → COGN (−) → DEMENTIA (+). A reduced AD risk in Mexican American (MA) women versus NHW women upon adjustment for SES and downstream factors (HR = 0.53, 95% CI: 0.35 to 0.80). For the non‐White versus NHW contrast in incident DEMENTIA, pathways involved lower SES, directly increasing cognitive deficits (or indirectly through lifestyle factors), which then directly increases DEMENTIA . DISCUSSION: Socioeconomic and lifestyle factors explaining disparities between NHB and NHW in dementia onset among women are important to consider for future observational and intervention studies. |
format | Online Article Text |
id | pubmed-8924949 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-89249492022-03-21 Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women Beydoun, May A. Weiss, Jordan Beydoun, Hind A. Fanelli‐Kuczmarski, Marie T. Hossain, Sharmin El‐Hajj, Ziad W. Evans, Michele K. Zonderman, Alan B. Alzheimers Dement (N Y) Research Articles INTRODUCTION: Racial disparities in Alzheimer's disease (AD) and all‐cause dementia (DEMENTIA) incidence may exist differentially among men and women, with unknown mechanisms. METHODS: A retrospective cohort study examining all‐cause and AD dementia incidence was conducted linking Third National Health and Nutrition Examination Survey (NHANES III) to Centers for Medicare & Medicaid Services Medicare data over ≤26 years of follow‐up (1988 to 2014). Cox regression and generalized structural equation models (GSEMs) were constructed among men and women ≥60 years of age at baseline (N = 4592). Outcomes included onset ages of all‐cause and AD dementia, whereas the main exposures were race/ethnicity contrasts (RACE_ETHN). Potential mediators) included socio‐economic status (SES), lifestyle factors (dietary quality [DIET] nutritional biomarkers [NUTR], physical activity [PA], social support [SS], alcohol [ALCOHOL], poor health [or HEALTH], poor cognitive performance [or COGN]. In addition to RACE_ETHN, the following were exogenous covariates in the GSEM and potential confounders in Cox models: age, sex, urban‐rural, household size, and marital status. RESULTS: Non‐Hispanic Black (NHB) women had a higher risk of DEMENTIA versus non‐Hispanic White (NHW) women in GSEM, consistent with Cox models (age‐adjusted model: hazard ratio [HR] = 1.34, 95% confidence interval [CI]: 1.10 to 1.61). The total effect of this RACE_ETHN contrast in women was explained by four main pathways: (1) RACE_ETHN→ poor cognitive performance (COGN, +) → DEMENTIA (+); (2) RACE_ETHN → SES (−) → COGN (−) → DEMENTIA (+); (3) RACE_ETHN → SES (−) → physical activity (PA, +) → COGN (−) → DEMENTIA (+); and (4) RACE_ETHN → SES (−) → DIET (+) → COGN (−) → DEMENTIA (+). A reduced AD risk in Mexican American (MA) women versus NHW women upon adjustment for SES and downstream factors (HR = 0.53, 95% CI: 0.35 to 0.80). For the non‐White versus NHW contrast in incident DEMENTIA, pathways involved lower SES, directly increasing cognitive deficits (or indirectly through lifestyle factors), which then directly increases DEMENTIA . DISCUSSION: Socioeconomic and lifestyle factors explaining disparities between NHB and NHW in dementia onset among women are important to consider for future observational and intervention studies. John Wiley and Sons Inc. 2022-03-16 /pmc/articles/PMC8924949/ /pubmed/35317081 http://dx.doi.org/10.1002/trc2.12275 Text en © 2022 The Authors. Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring published by Wiley Periodicals, LLC on behalf of Alzheimer's Association https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Articles Beydoun, May A. Weiss, Jordan Beydoun, Hind A. Fanelli‐Kuczmarski, Marie T. Hossain, Sharmin El‐Hajj, Ziad W. Evans, Michele K. Zonderman, Alan B. Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women |
title | Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women |
title_full | Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women |
title_fullStr | Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women |
title_full_unstemmed | Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women |
title_short | Pathways explaining racial/ethnic disparities in incident all‐cause and Alzheimer's disease dementia among older US men and women |
title_sort | pathways explaining racial/ethnic disparities in incident all‐cause and alzheimer's disease dementia among older us men and women |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8924949/ https://www.ncbi.nlm.nih.gov/pubmed/35317081 http://dx.doi.org/10.1002/trc2.12275 |
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