Abstract
Purpose
The purpose of this study was to compare centenarians in the United States and Japan on sensory, cognitive, and physical functioning and to evaluate a model that tests the interrelationship between physical function, cognition, and sensory impairment in these two unique samples of the oldest old.
Methods
The sample of U. S. centenarians included 245 centenarians, the sample of Japanese centenarians included 304 centenarians. Sensory impairment was assessed by general assessments of vision and hearing, and physical function was assessed with six physical activities of daily living (i.e., eating, grooming, dressing, transporting, bathing, and walking).
Results
The results suggest that centenarians from the Georgia study showed higher levels of functioning in all domains when compared to the Tokyo sample. A structural equation model yielded stronger associations between cognitive and sensory function with physical function for the Tokyo sample.
Conclusions
Functional differences may be due, in part, to different care patterns for the oldest old in the United States when compared to Japan.
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Acknowledgements
The Georgia Centenarian Study (Leonard W. Poon, PI) was funded by 1P01AG17553 from the National Institute on Aging, a collaboration among The University of Georgia, Tulane University Health Sciences Center, Boston University, University of Kentucky, Emory University, Duke University, Wayne State University, Iowa State University, Temple University, and University of Michigan. Additional authors include S. M. Jazwinski, R. C. Green, M. MacDonald, M. Gearing, W. R. Markesbery (deceased), J. L. Woodard, M. (A) Johnson, J. S. Tenover, I. C. Siegler, W. L. Rodgers, D. (B) Hausman, (C) Rott, A. Davey, and J. Arnold. Authors acknowledge the valuable recruitment and data acquisition effort from M. Burgess, K. Grier, E. Jackson, E. McCarthy, K. Shaw, L. Strong, and S. Reynolds, data acquisition team manager; S. Anderson, E. Cassidy, M. Janke, and J. Savla, data management; M. Poon for project fiscal management. The first author also acknowledges the support by the Fulbright Commission for his work on this project. The Tokyo Centenarian Study was supported in part by a grant from the Japanese Ministry of Health and Welfare for the Scientific Research Project on Longevity, a grant for studying the multidisciplinary approach to centenarians and its international comparison (Principal Investigator, Nobuyoshi Hirose); a grant from the Japanese Ministry of Education, Science and Culture (No. 15730346); and aid for research from the Keio Health Consulting Center. Both studies have been approved by their respective Institutional Review Boards.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Martin, P., Gondo, Y., Arai, Y. et al. Physical, sensory, and cognitive functioning among centenarians: a comparison between the Tokyo and Georgia centenarian studies. Qual Life Res 27, 3037–3046 (2018). https://doi.org/10.1007/s11136-018-1943-z
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DOI: https://doi.org/10.1007/s11136-018-1943-z