Association Between Shopping Assistance and Functional Decline in Older Residents with Support Levels Under the Long-Term Care Insurance System in Japan: A Retrospective, Cross-Sectional Study.

Maintaining functional independence and minimizing disability among older adults living in the community is paramount for mitigating rising care demands. Our study focused on shopping as a critical instrumental activity of daily living (ADL) to explore the association between shopping assistance and functional decline among older individuals receiving support through long-term care insurance (LTCI). This retrospective, cross-sectional study included 6202 participants aged >65 years living in a Japanese regional town receiving LTCI support, suggesting that they required assistance with local community life. Logistic regression analysis identified several factors associated with shopping assistance among the participants, including physical and cognitive functions, functional ADL, and psychobehavioral symptoms. In male participants, walking dysfunction, short-term memory decline, decreased frequency of going outdoors, and decreased engagement in personal grooming were significantly associated with requiring shopping assistance. Conversely, in female participants, reduced physical function and walking performance were significantly associated with requiring shopping assistance, whereas dependence on personal grooming was less pronounced than in male participants. These findings suggest that, in addition to direct shopping assistance, tailored interventions targeting physical, cognitive, and ADL functions-while considering gender-specific needs-may help older adults maintain independence in shopping activities as part of their daily community life.