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Article type: Research Article
Authors: Schwaber, Eric J.a; 1 | Thompson, Atalie C.b; 1 | Smilnak, Gordonb | Stinnett, Sandra S.b | Whitson, Heather E.b; c | Lad, Eleonora M.b; *
Affiliations: [a] Department of Internal Medicine, Griffin Hospital, Derby, CT, USA | [b] Department of Ophthalmology, Duke University Medical Center, Durham, NC, USA | [c] Department of Medicine, Division of Geriatrics, Duke University Medical Center, Durham, NC, USA
Correspondence: [*] Correspondence to: Eleonora Lad, MD, PhD, Duke University Medical Center, Department of Ophthalmology –DUMC 3802, Durham, NC 27710, USA. Tel.: +1 919 684 0587; Fax: +1 919 681 6474; E-mail: [email protected].
Note: [1] These authors contributed equally to this work.
Abstract: Background:Previous epidemiologic studies have suggested an association between AMD and AD, and several therapeutic agents are being developed based on this principle. However, prior studies have provided conflicting results due in part to their reliance on clinical diagnoses that are not based on gold-standard histopathology. Objective:To use histopathologic standards for diagnosis in order to determine the co-prevalence of AD among patients with and without AMD. Methods:This is a cross-sectional study of 157 autopsy ocular specimens from patients with and without AMD that were greater than 75 years of age at death. Sarks staging was used to document the severity of AMD, and Braak and Braak staging was used to assess the severity of AD in corresponding brain specimens. The prevalence of AD within different severities of AMD was determined using univariable and multivariable logistic regression. Results:58% of autopsy eyes had AMD. The prevalence of AD was lower in AMD subjects (63%) compared to non-AMD subjects (73%), even when grouped by severity (all p > 0.15). The likelihood of AD was significantly less in AMD subjects, even after adjusting for age and sex in multivariable analysis (OR 0.47, p = 0.049). Conclusion:Histopathologic diagnoses fail to support an increase in prevalence of AD among subjects with AMD, even when disease severity is considered.
Keywords: Age-related macular degeneration, Alzheimer’s disease, dementia, epidemiology, histopathology
DOI: 10.3233/JAD-200111
Journal: Journal of Alzheimer's Disease, vol. 76, no. 1, pp. 207-215, 2020
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