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Current Alzheimer Research

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ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

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Research Article

Early Detection of Dementia using Risk Classification in MCI: Outcomes of Shanghai Mild Cognitive Impairment Cohort Study

Author(s): Bin Zhou*, Qianhua Zhao, Shinsuke Kojima, Ding Ding, Satoshi Higashide, Masanori Fukushima and Zhen Hong*

Volume 20, Issue 6, 2023

Published on: 26 September, 2023

Page: [431 - 439] Pages: 9

DOI: 10.2174/1567205020666230914161034

Price: $65

Abstract

Introduction: The purpose of this study is to identify the risk factors and risk classification associated with the conversion from mild cognitive impairment (MCI) to Alzheimer’s disease (AD) dementia to facilitate early intervention and the design of clinical trials for AD.

Methods: The study comprised a prospective cohort study of 400 subjects with MCI who had annual follow-ups for 3 years.

Results: During an average follow-up period of 3.5 years, 109 subjects were diagnosed with all cause of dementia, of whom 104 subjects converted to Alzheimer’s dementia and 5 subjects converted to other types of dementia. The cumulative conversion rate was 5.5% (95% CI: 3.4, 8.6), 16.3% (95% CI: 12.9, 21.1), and 31.0% (95% CI: 25.4, 36.5) in each of the first 3 follow-up years, respectively. The factors associated with a greater risk of conversion from MCI to AD included smoking status, ApoE4 carrier status, right hippocampal volume (rt. HV), left temporal lobe volume, and scores on the Revised Chinese version of the Alzheimer’s Disease Assessment Scale-Cognitive Subscale 13 (ADAS-Cog-C). The risk classification of the ADAS-Cog-C or Preclinical Alzheimer Cognitive Composite (PACC) score combined with the rt. HV showed a conversion difference among the groups at every annual follow-up.

Conclusion: A simple risk classification using the rt. HV and neuropsychological test scores, including those from the ADAS-Cog-C and PACC, could be a practicable and efficient approach to indentify individuals at risk of all-cause dementia.

Keywords: Mild cognitive impairment, dementia, risk factors, PAACC, risk classification, Alzheimer’s disease.

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