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Applying the ATN scheme in a memory clinic population: The ABIDE project

Altomare, D; de Wilde, A; Ossenkoppele, R; Pelkmans, W; Bouwman, F; Groot, C; van Maurik, I; ... van der Flier, WM; + view all (2019) Applying the ATN scheme in a memory clinic population: The ABIDE project. Neurology , 93 (17) e1635-e1646. 10.1212/WNL.0000000000008361.

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Abstract

Objective To apply the ATN scheme to memory clinic patients, to assess whether it discriminates patient populations with specific features. Methods We included 305 memory clinic patients (33% subjective cognitive decline [SCD]: 60 ± 9 years, 61% M; 19% mild cognitive impairment [MCI]: 68 ± 9 years, 68% M; 48% dementia: 66 ± 10 years, 58% M) classified for positivity (±) of amyloid (A) ([18F]Florbetaben PET), tau (T) (CSF p-tau), and neurodegeneration (N) (medial temporal lobe atrophy). We assessed ATN profiles' demographic, clinical, and cognitive features at baseline, and cognitive decline over time. Results The proportion of A+T+N+ patients increased with syndrome severity (from 1% in SCD to 14% in MCI and 35% in dementia), while the opposite was true for A−T−N− (from 48% to 19% and 6%). Compared to A−T−N−, patients with the Alzheimer disease profiles (A+T+N− and A+T+N+) were older (both p < 0.05) and had a higher prevalence of APOE ε4 (both p < 0.05) and lower Mini-Mental State Examination (MMSE) (both p < 0.05), memory (both p < 0.05), and visuospatial abilities (both p < 0.05) at baseline. Non-Alzheimer profiles A−T−N+ and A-T+N+ showed more severe white matter hyperintensities (both p < 0.05) and worse language performance (both p < 0.05) than A−T−N−. A linear mixed model showed faster decline on MMSE over time in A+T+N− and A+T+N+ (p = 0.059 and p < 0.001 vs A−T−N−), attributable mainly to patients without dementia. Conclusions The ATN scheme identified different biomarker profiles with overlapping baseline features and patterns of cognitive decline. The large number of profiles, which may have different implications in patients with vs without dementia, poses a challenge to the application of the ATN scheme.

Type: Article
Title: Applying the ATN scheme in a memory clinic population: The ABIDE project
Location: United States
DOI: 10.1212/WNL.0000000000008361
Publisher version: https://doi.org/10.1212/WNL.0000000000008361
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Brain Repair and Rehabilitation
URI: https://discovery.ucl.ac.uk/id/eprint/10084779
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