Title | Odor Identification Screening Improves Diagnostic Classification in Incipient Alzheimer's Disease. |
Publication Type | Journal Article |
Year of Publication | 2017 |
Authors | Quarmley, M, Moberg, PJ, Mechanic-Hamilton, D, Kabadi, S, Arnold, SE, Wolk, DA, Roalf, DR |
Journal | J Alzheimers Dis |
Volume | 55 |
Issue | 4 |
Pagination | 1497-1507 |
Date Published | 2017 |
ISSN | 1875-8908 |
Abstract | BACKGROUND: Measurements of olfaction may serve as useful biomarkers of incipient dementia. Here we examine the improvement in diagnostic accuracy of Alzheimer's disease (AD) and mild cognitive impairment (MCI) when assessing both cognitive functioning and odor identification. OBJECTIVE: To determine the utility of odor identification as a supplementary screening test in incipient AD. METHODS: Sniffin' Sticks Odor Identification Test (SS-OIT) and the Montreal Cognitive Assessment (MoCA) were administered in 262 AD, 174 MCI [150 amnestic (aMCI), and 24 non-amnestic (naMCI)], and 292 healthy older adults (HOA). RESULTS: Odor identification scores were higher in HOA relative to MCI or AD groups, and MCI outperformed AD. Odor identification scores were higher in aMCI single domain than aMCI multiple domain. Complementing MoCA scores with the SS-OIT significantly improved diagnostic accuracy of individuals with AD and MCI, including within MCI subgroups. DISCUSSION: Odor identification is a useful supplementary screening tool that provides additional information relevant for clinical categorization of AD and MCI, including those who are at highest risk to convert to AD. |
DOI | 10.3233/JAD-160842 |
Alternate Journal | J. Alzheimers Dis. |
PubMed ID | 27886011 |
PubMed Central ID | PMC5350629 |
Grant List | K01 MH102609 / MH / NIMH NIH HHS / United States P30 AG010124 / AG / NIA NIH HHS / United States P50 AG005134 / AG / NIA NIH HHS / United States |