The Japanese Translation Study of the Cognitive Reserve Index Questionnaire.

Authors

Osamu Katayama, Ryo Yamaguchi, Daiki Yamagiwa, Shoma Akaida, Takahiro Shimoda, Chika Nakajima, Ayuka Kawakami, Kenji Harada, Sho Nakakubo, Fumio Sakimoto, Soichiro Matsuda, Chiharu Nishijima, Shinnosuke Nosaka, Kanon Abe, Masanori Morikawa, Daisuke Kakita, Takuto Okuya, Kazuki Soma, Yuma Hirano, Yuto Nakashima, Hiroyuki Shimada

Published in

Geriatrics & gerontology international. Volume 26. Issue 8. Pages e70803.

Abstract

The cognitive reserve index questionnaire (CRIq) is widely used to quantify cognitive reserve (CR), but a validated Japanese version is lacking. This study aimed to translate and culturally adapt the CRIq and its short version (s-CRIq) into Japanese (CRIq-J and sCRIq-J) and to evaluate their reliability and criterion-related validity.
Following international guidelines for cultural adaptation and translation, we translated and culturally adapted the CRIq and s-CRIq into Japanese. The study participants were 3567 community-dwelling Japanese older adults from a large-scale cohort. Global cognitive performance was assessed with the composite score of the National Center for Geriatrics and Gerontology-Functional Assessment Tool and global cognitive impairment (GCI) was defined as a mini-mental state examination score ≤ 23. Internal consistency was assessed using Cronbach's alpha. Multiple and logistic regression analyses were performed to examine associations between CRIq-J and sCRIq-J total scores and global cognitive performance, including GCI.
Cronbach's alpha coefficients were 0.58 for the CRIq-J and 0.48 for the sCRIq-J, reflecting the multidimensional nature of life-course experiences. After adjusting for age and sex, higher scores on both the CRIq-J (β = 0.21, 95% CI: 0.18-0.24, p < 0.001) and sCRIq-J (β = 0.21, 95% CI: 0.17-0.25, p < 0.001) were significantly associated with superior cognitive performance. Furthermore, higher CRI levels were associated with a significantly lower likelihood of GCI.
The CRIq-J and sCRIq-J demonstrated acceptable reliability and robust criterion-related validity in a Japanese population. These standardized tools represent a significant milestone for future CR research and the development of dementia prevention strategies in Japan.

PMID:
42608316
Bibliographic data and abstract were imported from PubMed on 18 Aug 2026.

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