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Updated: Jun 21, 2026
06:35
Basics of Multivariate Analysis in Neuroimaging Data
Published on: July 24, 2010
Identification of VaD and AD prodromes: the Cache County Study
K M Hayden1, L H Warren, C F Pieper
1Center for the Study of Aging and Human Development, Duke University Medical Center, Durham, NC, USA.
Summary
Vascular dementia (VaD) shows a distinct cognitive prodrome, differing from Alzheimer's dementia (AD). Neuropsychological tests can identify these early signs years before diagnosis.
Area of Science:
- Neurology
- Gerontology
- Cognitive Science
Background:
- The existence of a cognitive prodrome for vascular dementia (VaD) is not well-established, unlike the known prodrome for Alzheimer's dementia (AD).
- Differentiating prodromal VaD from prodromal AD is crucial for accurate diagnosis and timely intervention in aging populations.
Purpose of the Study:
- To investigate whether VaD exhibits a cognitive prodrome.
- To determine if prodromal VaD can be distinguished from prodromal AD using neuropsychological assessments.
Main Methods:
- A nested case-control study was conducted within the Cache County Study, involving 485 participants aged 65+.
- Neuropsychological tests focusing on executive function and memory were administered to identify 62 incident dementia cases (14 VaD, 48 AD) over a 3-year follow-up.
- Multivariate analyses were used to differentiate between prodromal VaD and AD groups up to 3 years prior to clinical diagnosis.
Main Results:
- Specific neuropsychological tests, including the CERAD Word List Recognition Test and Logical Memory tests, differentiated diagnosed VaD from AD cases.
- Three years before diagnosis, distinct patterns in word list recognition performance (foil recognition and yes/no responses) successfully discriminated between prodromal VaD and prodromal AD.
Conclusions:
- The findings strongly suggest that VaD possesses a recognizable prodromal syndrome.
- The cognitive characteristics of prodromal VaD are distinguishable from those of prodromal AD, enabling earlier differentiation.
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