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Original Article
Dementia and Neurocognitive Disorders 2021: 20: 3: 28-37

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Validity of the Montreal Cognitive Assessment (MoCA) Index Scores: a Comparison with the Cognitive Domain Scores of the Seoul Neuropsychological Screening Battery (SNSB)
Haeyoon Kim , 1,2 Kyung-Ho Yu , 3 Byung-Chul Lee , 3 Byeong-Chae Kim , 1 Yeonwook Kang 2,3
1 Department of Neurology, Chonnam National University Hospital, Gwangju, Korea 2 Department of Psychology, College of Social Sciences, Hallym University, Chuncheon, Korea 3 Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
Validity of the Montreal Cognitive Assessment (MoCA) Index Scores: a Comparison with the Cognitive Domain Scores of the Seoul Neuropsychological Screening Battery (SNSB)
Haeyoon Kim , 1,2 Kyung-Ho Yu , 3 Byung-Chul Lee , 3 Byeong-Chae Kim , 1 Yeonwook Kang 2,3
1 Department of Neurology, Chonnam National University Hospital, Gwangju, Korea 2 Department of Psychology, College of Social Sciences, Hallym University, Chuncheon, Korea 3 Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
Background and Purpose: A new approach was proposed to score the Montreal Cognitive
Assessment (MoCA) index scores for 6 cognitive domains: orientation (OIS), attention
(AIS), language (LIS), visuospatial function (VIS), memory (MIS), and executive function
(EIS). This study investigated whether the MoCA index scores represent the functions of
each cognitive domain by examining the correlations with the corresponding cognitive
domain scores derived from conventional neuropsychological tests included in the Seoul
Neuropsychological Screening Battery, 2nd Edition (SNSB-II).
Methods: The participants were 104 amnestic mild cognitive impairment (aMCI), 74 vascular
mild cognitive impairment (VaMCI), 73 dementia of the Alzheimer's type (DAT), and 41
vascular dementia (VaD) patients. All participants were administered the Korean-MoCA and
SNSB-II.
Results: Like the MoCA total score, the MoCA-OIS, MoCA-VIS, and MoCA-MIS showed
differences between aMCI and AD groups and between VaMCI and VaD groups. The MoCAAIS, MoCA-LIS, and MoCA-EIS showed significant differences between VaMCI and VaD
groups, but no difference between aMCI and DAT groups. In the aMCI and VaMCI groups, all
index scores of the MoCA showed significant correlations with the corresponding cognitive
domain scores of the SNSB-II. Except for MoCA-MIS, the MoCA-AIS, MoCA-LIS, MoCA-VIS,
and MoCA-EIS also showed significant correlations with the corresponding domain scores of
the SNSB-II in the DAT and VaD groups.
Conclusions: These results indicate that all MoCA index scores, except for MoCA-MIS, which
does not reflect the severity of memory impairment in dementia patients, provide highly
valid information on the function of each cognitive domain in patients with mild cognitive
impairment and dementia.
Key Words: Montreal Cognitive Assessment; Mild Cognitive Impairment; Dementia