Age and Ageing, Vol 29, 441-446, Copyright © 2000 by British Geriatrics Society
S Shinkai, S Watanabe, S Kumagai, Y Fujiwara, H Amano, H Yoshida, T Ishizaki, H Yukawa, T Suzuki and H Shibata
Objective. To investigate and compare the predictive
values of four physical performance measures for the onset of functional
dependence in older Japanese people living at home.Design.
A population-based prospective cohort study.Setting.
Nangai village, Akita Prefecture, Japan.Method.
Out of the population aged 65 years and older living in Nangai
(n940) in 1992, we measured hand grip-strength,
one-leg standing, and usual maximum walking speeds in 736 subjects who were
independent in the five basic activities of daily living. Their functional
status was assessed each year for the subsequent 6 years. The outcome event
was the onset of functional dependence, defined as a new disability in one
or more of the five basic activities of daily living, or death of a subject
who had shown no disability at the previous follow-up.Results.
Even after controlling for age, sex and a number of chronic
conditions, lower scores on each baseline performance measure showed
increased risk for the onset of functional dependence. Maximum walking
speed was most sensitive in predicting future dependence for those aged
65-74 years, while usual walking speed was most sensitive for people aged
ARTICLES
Walking speed as a good predictor for the onset of functional dependence in a Japanese rural community population
Departments of Community Health, Information Science, Epidemiology and Social Welfare, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-9915, Japan; Corresponding author; Fax: +81 3 3579 4776; E-mail: sshinkai@tmig.or.jp
75 years.Conclusion. Walking speed was the
best physical performance measure for predicting the onset of functional
dependence in a Japanese rural older population.Keywords:
cohort study, functional dependence, older adults, physical
performance measure, walking speed
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