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June 8, 2026Journal of Epidemiology1 citationsOpen Access

Association between intra-household isolation and frailty among community-dwelling older adults in Japan: A cross-sectional analysis of the Wako Cohort Study

HMHiroshi MurayamaTokyo Metropolitan Institute of Gerontology YYYuri YokoyamaTokyo Metropolitan Institute of Gerontology YNYu NofujiTokyo Metropolitan Institute of Gerontology

Key Points

This study aims to investigate the relationship between intra-household isolation and frailty among older adults living in the community in Japan.
Cross-sectional analysis of the Wako Cohort Study
Examination of intra-household isolation and frailty measures
Exploration of the role of external social connections in the association
Increased intra-household isolation is significantly associated with higher levels of frailty among older adults
Social connections outside the household may influence this association, although specific data was not provided

Abstract

Background: Frailty is a growing public health concern, with emerging evidence highlighting the importance of social determinants, including external and intra-household isolation. This study examined the association between intra-household isolation and frailty among community-dwelling older adults in Japan and explored whether external social connections modified this association.

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