Document Type
Article
Publication Date
10-1-2006
Journal
Alzheimer's and Dementia
Volume
2
Issue
4
First Page
296
Last Page
302
URL with Digital Object Identifier
10.1016/j.jalz.2006.06.001
Abstract
Background: Several previous studies have reported that amnestic mild cognitive impairment (aMCI), a significant risk factor for Alzheimer's disease (AD), is associated with greater atrophy in the medial temporal lobe (MTL) and posterior cingulate gyrus (PCG). Method: In the present study, we examined the cross-sectional accuracy (i.e., the sensitivity and specificity) of voxel-based morphometry (VBM) in discriminating individuals with MCI (n = 15) from healthy age-matched controls (n = 15). In addition, we also sought to determine whether baseline GM volume predicted aMCI patients that converted to AD from those that did not approximately 2 years after the baseline visit. Results: MCI patients were found to display significantly less GM volume in several hypothesized regions including the MTL and PCG relative to the age-matched controls (p < 0.01). Logistic regression analysis and receiver operating characteristic (ROC) curves for GM volume in the anterior MTL and PCG revealed high discriminative accuracy of 87%. By contrast, baseline GM volume in anterior MTL and PCG did not appear to be sensitive to changes in clinical status at the follow-up visit. Conclusion: These results suggest that VBM might be useful at characterizing GM volume reductions associated with the diagnosis of aMCI. © 2006 The Alzheimer's Association.
Notes
This is an author-accepted manuscript.
The publisher's version is available as;
Trivedi, M.A., Wichmann, A.K., Torgerson, B.M., Ward, M.A., Schmitz, T.W., Ries, M.L., Koscik, R.L., Asthana, S. and Johnson, S.C. (2006), Structural MRI discriminates individuals with Mild Cognitive Impairment from age-matched controls: A combined neuropsychological and voxel based morphometry study. Alzheimer's & Dementia, 2: 296-302 ALZJJALZ200606001. https://doi.org/10.1016/j.jalz.2006.06.001