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Housing Adaptations and Long-Term Care Facility Admissions among Older Adults with Care Needs in Japan
Rumiko Tsuchiya-Ito1, Seigo Mitsutake2, Satomi Kitamura3
1Research Department, Institute for Health Economics and Policy, Association for Health Economics Research and Social Insurance and Welfare, Tokyo, Japan; Research Department, Dia Foundation for Research on Ageing Societies, Tokyo, Japan.
Objectives:
Housing adaptations may contribute to aging in place for older adults with care needs by reducing the risk of long-term care facility (LTCF) admissions, but this association remains unclear. We examined the association between housing adaptations and LTCF admissions among older adults with care needs.
Design:
Retrospective cohort study using data from a Japanese municipality.
Setting/Participants:
Adults aged ≥65 years who were newly certified with care needs under the public long-term care insurance system between April 2014 and March 2016.
Methods:
The study exposure was the implementation of insurance-covered housing adaptations (maximum covered cost: ¥200,000) during the 2 years after certification. Based on this exposure, participants were assigned to a non-implementation group (no housing adaptations), sub-maximum cost group (housing adaptations below the maximum cost), or maximum cost group (housing adaptations at the maximum cost). A Fine-Gray subdistribution hazards model was used to analyze the associations between the exposure groups and new LTCF admissions after adjusting for various risk factors. Death was regarded as a competing risk, and participants were followed until March 2022.
Results:
Among 4610 participants, 1261 (27.3%) had implemented housing adaptations. Among these, 943 (74.8%) were in the sub-maximum cost group and 318 (25.2%) were in the maximum cost group. During the follow-up period (median: 51 months), the incidence of LTCF admission was 3.9/1000 person-months in the non-implementation group, 3.8/1000 person-months in the sub-maximum cost group, and 2.8/1000 person-months in the maximum cost group. The adjusted subdistribution hazard ratio of LTCF admission (reference: non-implementation) was 0.90 (95% CI: 0.75-1.08) for the sub-maximum cost group and 0.67 (0.49-0.93) for the maximum cost group.
Conclusions And Implications:
Housing adaptations can support aging in place for older adults with care needs. Health care professionals and policymakers should consider the suitability of housing environments to reduce the risk of institutionalization.
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