Validity and Cost-Consequence Analysis of the Brief Version of the Montreal Cognitive Assessment for Discriminating Cognitive Impairment in a Community-Based Middle-Aged and Elderly Population

Ting PANG; Yaping ZHANG; Renwei CHEN; Aiju MA; Xiaoyi YU; Yiwen HUANG; Yichun LU; Xin XU

doi:10.3881/j.issn.1000-503X.16242

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Acta Academiae Medicinae Sinicae ›› 2025, Vol. 47 ›› Issue (3) : 382-389. DOI: 10.3881/j.issn.1000-503X.16242

Validity and Cost-Consequence Analysis of the Brief Version of the Montreal Cognitive Assessment for Discriminating Cognitive Impairment in a Community-Based Middle-Aged and Elderly Population

Ting PANG ¹^,²^,³ ,
Yaping ZHANG ¹^,² ,
Renwei CHEN ¹^,² ,
Aiju MA ¹^,² ,
Xiaoyi YU ¹ ,
Yiwen HUANG ¹ ,
Yichun LU ¹ ,
Xin XU ¹^,²^,³

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Abstract

Objective To evaluate the reliability and validity and perform cost-consequence analysis of the brief version of the Montreal cognitive assessment(MoCA)for identifying cognitive impairment in a community-based population ≥50 years of age.Methods The internal consistency and retest reliability of the brief version of the MoCA were analyzed,and the area under the curve(AUC),sensitivity,and specificity were determined to discriminate mild cognitive impairment(MCI)and dementia with the clinical dementia rating(CDR)as the diagnostic criterion.The consistency between the brief version and the full version was analyzed by the Kappa test and the Bland-Altman method,and the number of individuals entering the diagnostic assessment and the overall assessment time were estimated and compared between the two versions.Results A total of 303 individuals were included in this study,of whom 192,94,and 17 had normal cognitive function,MCI,and dementia,respectively.The Cronbach’s α and re-test coefficients of the brief version of MoCA were 0.754 and 0.711(P<0.001),respectively.The brief version showed the AUC,sensitivity,and specificity of 0.889,74.5%,and 93.8% for identifying MCI,and 0.994,100%,and 93.8% for identifying dementia,respectively.When the brief version of MoCA was used to identify 94 patients with MCI in 303 individuals,107 individuals required additional diagnostic assessment,with an overall assessment time of 142.4 h,which represented decreases of 21.3% and 32.7%,respectively,compared with those of the full version.When the brief version of MoCA was used to identify 17 patients with dementia in 303 individuals,35 individuals required additional diagnostic assessment,with an overall assessment time of 70.4 h,a decrease of 29.5% in the time cost compared with the full version.Conclusions The brief version of MoCA can identify cognitively impaired individuals in a community-based middle-aged and elderly population,with diagnostic validity comparable to that of the full version but less time cost and fewer individuals needing additional diagnostic assessment to detect true-positive cases.It could be expanded for use in the community-based primary screening setting.

Key words

cognitive impairment / the brief version of the Montreal cognitive assessment / reliability / discriminant validity / cost-consequences

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Ting PANG , Yaping ZHANG , Renwei CHEN , et al . Validity and Cost-Consequence Analysis of the Brief Version of the Montreal Cognitive Assessment for Discriminating Cognitive Impairment in a Community-Based Middle-Aged and Elderly Population[J]. Acta Academiae Medicinae Sinicae. 2025, 47(3): 382-389 https://doi.org/10.3881/j.issn.1000-503X.16242

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