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ABSTRACT: Introduction
Spatial navigation deficits are observed in Alzheimer's disease cross-sectionally, but prediction of longitudinal clinical decline has been less examined.Methods
Cognitive mapping (CM) was assessed in 95 participants and route learning (RL) was assessed in 65 participants at baseline. Clinical progression over an average of 4 to 5 years was assessed using the clinical dementia rating (CDR) scale. Relative predictive ability was compared to episodic memory, hippocampus, and cerebrospinal fluid biomarkers (phosphorylated tau/amyloid ? 42 (ptau181 /A?42 ) ratio).Results
CM and RL were predictors of clinical progression (P's < 0.032). All measures, except RL-Learning remained predictors with episodic memory in models (P's < 0.048). Only RL-Retrieval remained a predictor when ptau181 /A?42 was included (P < 0.001). CM interacted with hippocampus and ptau181 /A?42 in prediction (P's < 0.013). CM, RL, and episodic memory evidenced strong diagnostic accuracy (area under the curve (AUC) = 0.894, 0.794, and 0.735, respectively); CM tended to perform better than episodic memory (P = 0.056).Discussion
Baseline spatial navigation performance may be appropriate for assessing risk of clinical progression.
SUBMITTER: Levine TF
PROVIDER: S-EPMC7067640 | biostudies-literature | 2020 Mar
REPOSITORIES: biostudies-literature
Levine Taylor F TF Allison Samantha L SL Stojanovic Marta M Fagan Anne M AM Morris John C JC Head Denise D
Alzheimer's & dementia : the journal of the Alzheimer's Association 20200211 3
<h4>Introduction</h4>Spatial navigation deficits are observed in Alzheimer's disease cross-sectionally, but prediction of longitudinal clinical decline has been less examined.<h4>Methods</h4>Cognitive mapping (CM) was assessed in 95 participants and route learning (RL) was assessed in 65 participants at baseline. Clinical progression over an average of 4 to 5 years was assessed using the clinical dementia rating (CDR) scale. Relative predictive ability was compared to episodic memory, hippocampu ...[more]