Publication Type Academic Article
Authors Duits F, Teunissen C, Bouwman F, Visser P, Mattsson N, Zetterberg H, Blennow K, Hansson O, Minthon L, Andreasen N, Marcusson J, Wallin A, Rikkert M, Tsolaki M, Parnetti L, Herukka S, Hampel H, De Leon M, Schröder J, Aarsland D, Blankenstein M, Scheltens P, van der Flier W
Journal Alzheimers Dement
Volume 10
Issue 6
Pagination 713-723.e2
Date Published 04/08/2014
ISSN 1552-5279
Keywords Alzheimer Disease, Amyloid beta-Peptides, Peptide Fragments, tau Proteins
Abstract BACKGROUND: We aimed to identify the most useful definition of the "cerebrospinal fluid Alzheimer profile," based on amyloid-ß1-42 (Aβ42), total tau, and phosphorylated tau (p-tau), for diagnosis and prognosis of Alzheimer's disease (AD). METHODS: We constructed eight Alzheimer profiles with previously published combinations, including regression formulas and simple ratios. We compared their diagnostic accuracy and ability to predict dementia due to AD in 1385 patients from the Amsterdam Dementia Cohort. Results were validated in an independent cohort (n = 1442). RESULTS: Combinations outperformed individual biomarkers. Based on the sensitivity of the best performing regression formulas, cutoffs were chosen at 0.52 for the tau/Aβ42 ratio and 0.08 for the p-tau/Aβ42 ratio. Ratios performed similar to formulas (sensitivity, 91%-93%; specificity, 81%-84%). The same combinations best predicted cognitive decline in mild cognitive impairment patients. Validation confirmed these results, especially regarding the tau/Aβ42 ratio. CONCLUSIONS: A tau/Aβ42 ratio of >0.52 constitutes a robust cerebrospinal fluid Alzheimer profile. We recommend using this ratio to combine biomarkers.
DOI 10.1016/j.jalz.2013.12.023
PubMed ID 24721526
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