Abstract
Background
Although overlapping frailty and fear of falling (FoF) are likely to increase with population aging, the combined effect of frailty and FoF on incident disability is not yet well understood.
Aims
The purpose of this study is to examine whether frailty combined with FoF increased the risk of incident disability in older adults. Our secondary purpose was to clarify the synergistic effect of frailty and FoF on incident disability.
Methods
This is a prospective study. Participants were 9372 older adults (mean age 73.5 years). Frailty status was assessed using the Japanese Cardiovascular Health Study index, and FoF was measured using two closed questions. Incident disability was prospectively monitored by their long-term care insurance records.
Results
During the follow-up period (mean duration 23.4 months), 487 (5.2%) participants developed disability. The proportion of incident disability linearly increased according to FoF level regardless of baseline frailty status. Frail participants with FoF had a higher risk of incident disability than those with frailty only or neither (adjusted hazard ratio [HR] 2.63, 95% confidence interval [CI] 1.95–3.54). Frailty in combination with excessive FoF further increased the risk of incident disability (adjusted HR 4.30, 95% CI 2.56–7.23) although no synergistic effect was observed (relative excessive risk due to interaction 1.69, 95% CI − 0.55, 3.93).
Conclusion
The overlapping status of frailty and FoF, especially excessive FoF, increases the risk of incident disability in older adults.
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Data availability
No data are available.
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Acknowledgements
We would like to thank the Obu City and Nagoya City Office for supporting our participant recruitment in this study. We thank Diane Williams, PhD, from Edanz (https://jp.edanz.com/ac) for editing a draft of this manuscript.
Funding
This work was supported under the Grant-in-Aid for Scientific Research (B) [grant number 23300205] and the Grant-in-Aid for Young Scientists [grant number 18K17393] from the Japanese Ministry of Health, Labour and Welfare; the Research Funding for Longevity Sciences [grant numbers 22-16, 24-18 and 25-26] from the National Center for Geriatrics and Gerontology; and the JST Strategic Basic Research Programs (RISTEX Redesigning Communities for Aged Society).
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Conceptualization, RS, TD, KT, SN, SK, YK, KN, and HS; methodology, RS, TD, KT, SN, and HS; formal analysis, RS, and TD; writing-original draft preparation, RS; writing-review and editing, TD, KT, SN, SK, YK, KN, and HS; supervision, TD, and HS; All authors have read and agreed to the submitted version of the manuscript.
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Sawa, R., Doi, T., Tsutsumimoto, K. et al. Overlapping status of frailty and fear of falling: an elevated risk of incident disability in community-dwelling older adults. Aging Clin Exp Res 35, 1937–1944 (2023). https://doi.org/10.1007/s40520-023-02474-z
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DOI: https://doi.org/10.1007/s40520-023-02474-z