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Montreal Cognitive Assessment and Mini-Mental State Examination performance in patients with mild-to-moderate dementia with Lewy bodies, Alzheimer's disease, and normal participants in Taiwan

Published online by Cambridge University Press:  07 August 2013

Carol Sheei-Meei Wang ,
Ming-Chyi Pai ,
Pai-Lien Chen ,
Nien-Tsen Hou ,
Pei-Fang Chien  and
Ying-Che Huang
Carol Sheei-Meei Wang
Affiliation:
Department of Psychiatry, Tainan Hospital, Department of Health, Executive Yuan, Tainan city, Taiwan
Ming-Chyi Pai*
Affiliation:
Division of Behavioral Neurology, Department of Neurology and Alzheimer's Disease Center, National Cheng Kung University Hospital, Medical College, National Cheng Kung University, Tainan City, Taiwan
Pai-Lien Chen
Affiliation:
Biostatistics Department, FHI 360, NC, USA
Nien-Tsen Hou
Affiliation:
Department of Neurology, Tainan Hospital, Department of Health, Executive Yuan, Tainan City, Taiwan
Pei-Fang Chien
Affiliation:
Department of Psychiatry, Tainan Hospital, Department of Health, Executive Yuan, Tainan city, Taiwan
Ying-Che Huang
Affiliation:
Department of Neurology, Tainan Hospital, Department of Health, Executive Yuan, Tainan City, Taiwan
*
Correspondence should be addressed to: Ming-Chyi Pai, M.D., Ph.D., Division of Behavioral Neurology, Department of Neurology and Alzheimer's Disease Center, National Cheng Kung University Hospital, Medical College, National Cheng Kung University, No. 138, Sheng Li Road, Tainan City 700, Taiwan. Phone: +886-6-2353535ext5534; Fax: +886-6-2088036. Email: pair@mail.ncku.edu.tw.
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Abstract

Background:

The aim of this study was to examine and test the sensitivity, specificity, and threshold scores of the Montreal Cognitive Assessment (MoCA) and the Mini-Mental State Examination (MMSE) and determine those that best correspond to a clinical diagnosis of dementia with Lewy bodies (DLB).

Methods:

Sixty-seven Alzheimer's disease (AD), 36 DLB, and 62 healthy participants without dementia (NC), aged 60 to 90, were enrolled. All three groups took the MoCA and MMSE tests at the same time. The Cochran–Mantel–Haenszel tests and receiver operating characteristics curve analysis were used to compare the different neuropsychological test results among the groups.

Results:

The cut-off point of the MoCA for AD was 21/22 with a sensitivity of 95.5% and a specificity of 82.3% (area under the curve (AUC): 0.945), and the cut-off point for DLB was 22/23 with a sensitivity of 91.7% and a specificity of 80.6% (AUC: 0.932). For the MMSE, the cut-off points for AD and for DLB from NC were all 24/25, with a sensitivity of 88.1% and a specificity of 85.5% for AD (AUC: 0.92), and a sensitivity of 77.8% and a specificity of 85.5% for DLB (AUC: 0.895). After controlling sex, age, and education, AD and DLB had lower scores in all MoCA subscales than the NC group (p < 0.05), except for the orientation and naming in DLB. In addition, AD had a lower score in the MoCA orientation (p = 0.03) and short-term memory (p = 0.02) than did DLB.

Conclusions:

The MoCA is a more sensitive instrument than the MMSE to screen AD or DLB patients from non-dementia cases.

Keywords

dementia with Lewy bodiesAlzheimer’s diseaseMontreal Cognitive AssessmentMini-Mental State Examination
Type
Research Article
Information
International Psychogeriatrics , Volume 25 , Issue 11 , November 2013 , pp. 1839 - 1848
Copyright
Copyright © International Psychogeriatric Association 2013 

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