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Dement Geriatr Cogn Dis Extra. 2013 Oct 26;3(1):398-406. doi: 10.1159/000355553. eCollection 2013.

Cognitive activities and instrumental activity of daily living in older adults with mild cognitive impairment.

Author information

1
Section for Health Promotion, Department for Research and Development to Support Independent Life of Elderly, Obu, Japan ; Research Institute, National Center for Geriatrics and Gerontology, Obu, Japan ; Japan Society for the Promotion of Science, Tokyo, Japan.
2
Section for Health Promotion, Department for Research and Development to Support Independent Life of Elderly, Obu, Japan.
3
Section for Physical Functioning Activation, Department of Functioning Activation, Center for Gerontology and Social Science, Obu, Japan.
4
Section for Health Promotion, Department for Research and Development to Support Independent Life of Elderly, Obu, Japan ; Japan Society for the Promotion of Science, Tokyo, Japan.
5
Research Institute, National Center for Geriatrics and Gerontology, Obu, Japan.

Abstract

AIMS:

This study aimed to identify differences in the implementation of cognitive activities and instrumental activities of daily living (IADLs) between healthy individuals and subjects with mild cognitive impairment (MCI).

METHODS:

The study included 2,498 cognitively healthy subjects (mean age, 71.2 ± 5.1 years) and 809 MCI subjects (mean age, 71.8 ± 5.4 years). The subjects were interviewed regarding their participation in cognitive activities and the implementation of IADLs.

RESULTS:

We found a significant association between participation in any cognitive activities (p < 0.001), using a bus or a train (p < 0.001), and MCI. After adjusting for covariates, cognitive activity of any type remained significantly associated with MCI (p < 0.005) but not with the implementation of IADLs.

CONCLUSIONS:

Our study revealed that greater participation in cognitive activity was associated with lower odds of MCI. Participation in cognitive activities may reflect differences between healthy and MCI subjects. To clarify the causal relationship between cognitive activities and MCI, further studies are required.

KEYWORDS:

Alzheimer's disease; Cognitive impairment; Cognitive reserve; Dementia

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