The utility of olfactory function in distinguishing early-stage Alzheimer's disease from HIV-associated neurocognitive disorders

Given the rising number of older people with HIV (PWH) and the overlap in cognitive dysfunction profiles in HIV-associated neurocognitive disorders (HAND) and Alzheimer's disease and its precursor, amnestic mild cognitive impairment (aMCI), methods are needed to distinguish aMCI/Alzheimer'...

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Veröffentlicht in:AIDS (London) 2021-03, Vol.35 (3), p.429-437
Hauptverfasser: Sundermann, Erin E., Fields, Adam, Saloner, Rowan, Gouaux, Ben, Bharti, Ajay, Murphy, Claire, Moore, David J.
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container_end_page 437
container_issue 3
container_start_page 429
container_title AIDS (London)
container_volume 35
creator Sundermann, Erin E.
Fields, Adam
Saloner, Rowan
Gouaux, Ben
Bharti, Ajay
Murphy, Claire
Moore, David J.
description Given the rising number of older people with HIV (PWH) and the overlap in cognitive dysfunction profiles in HIV-associated neurocognitive disorders (HAND) and Alzheimer's disease and its precursor, amnestic mild cognitive impairment (aMCI), methods are needed to distinguish aMCI/Alzheimer's disease from HAND. As an early indicator of Alzheimer's disease, we examined whether olfactory dysfunction could help to distinguish between aMCI/Alzheimer's disease and HAND among PWH. An observational cohort study. Eighty-one older (≥50 years) PWH (83% men, 65% white) from the California NeuroAIDS Tissue Consortium completed the University of Pennsylvania Smell Identification Test (UPSIT; higher scores = better smell identification) and a comprehensive seven-domain neuropsychological test battery and neuromedical evaluation. HAND was classified via Frascati criteria. High aMCI risk was defined as impairment (>1.0 SD below normative mean) on two of four delayed recall or recognition outcomes (at least one recognition impairment required) from the Hopkins Verbal Learning Test-Revised and the Brief Visuospatial Memory Test-Revised. We examined UPSIT scores in relation to aMCI risk and HAND status, and continuous memory scores considering adjustments for demographics and relevant clinical or HIV disease characteristics. Fifty-seven participants were classified with HAND (70%) and 35 participants were classified as high aMCI risk (43%). UPSIT scores were lower (worse) in the high versus low aMCI risk group [F (1,76) = 10.04, P = 0.002], but did not differ by HAND status [F (1,76) = 0.62, P = 0.43]. UPSIT scores positively correlated with all memory outcomes (Ps 
doi_str_mv 10.1097/QAD.0000000000002761
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subjects Aged
Aged, 80 and over
Alzheimer Disease - complications
Alzheimer Disease - diagnosis
Cognitive Dysfunction - diagnosis
Cognitive Dysfunction - etiology
Female
HIV Infections - complications
Humans
Male
Memory
Neuropsychological Tests
title The utility of olfactory function in distinguishing early-stage Alzheimer's disease from HIV-associated neurocognitive disorders
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