Maximum Occlusal Force and Physical Performance in the Oldest Old: The Tokyo Oldest Old Survey on Total Health
Article first published online: 28 DEC 2011
© 2011, Copyright the Authors Journal compilation © 2011, The American Geriatrics Society
Journal of the American Geriatrics Society
Volume 60, Issue 1, pages 68–76, January 2012
How to Cite
Iinuma, T., Arai, Y., Fukumoto, M., Takayama, M., Abe, Y., Asakura, K., Nishiwaki, Y., Takebayashi, T., Iwase, T., Komiyama, K., Gionhaku, N. and Hirose, N. (2012), Maximum Occlusal Force and Physical Performance in the Oldest Old: The Tokyo Oldest Old Survey on Total Health. Journal of the American Geriatrics Society, 60: 68–76. doi: 10.1111/j.1532-5415.2011.03780.x
- Issue published online: 12 JAN 2012
- Article first published online: 28 DEC 2011
- Differing Fields Collaboration Grant
- Center for Research Promotion's Grant Programs for Researchers
- Grant-in-Aid for Scientific Research. Grant Numbers: 2059706, 21590775, 22592347
- Japan Society for the Promotion of Science
- Institute for Food and Health
- Japan Health Foundation for the Prevention of Chronic Disease and the Improvement of QOL of Patients
- Foundation for Total Health Promotion
- The Univers Foundation
- Chiyoda Mutual Life Foundation
- occlusal force;
- physical performance;
- oldest old;
To elucidate the independent relationship between masticatory and physical performance in community-living oldest old people (mean age ± standard deviation 87.8 ± 2.2, range 85–102).
University research center or home-based examination.
Four hundred eighty-nine community-living individuals (219 men, 270 women) aged 85 and older.
Maximum occlusal force (MOF) was measured using an occlusal force measuring device. Sociodemographic and functional factors, oral health, comorbidities, blood chemistry, lower extremity performance, and handgrip strength were assessed. Blood chemistry analyses included serum albumin, C-reactive protein, interleukin (IL)-6, and total and free testosterone.
MOF was significantly associated with age, body mass index, and cognitive impairment in men but not in women. Comorbidities and blood chemistry were not associated with MOF except for a significant association with IL-6 concentration in women. In a multivariate model adjusted for various confounders, lower MOF was associated with greater risk for poor performance on the timed up and go (TUG) test in men and women (men: odds ratio (OR)=2.34, 95% confidence interval (CI)=1.02–5.38; women: OR=2.44, 95% CI=1.12–5.33). MOF was similarly associated with performance in chair standing, one-leg standing, and handgrip strength only in men. These associations remained after adjustment for number of natural teeth.
MOF was strongly and independently associated with all measures of physical performance in men and with the TUG test in women after adjustment for various confounders, suggesting that age-related declines in masticatory and skeletal muscle functions share common mechanistic pathways in older age, particularly in men.