Presented at the 57th Annual Scientific Meeting of the Gerontological Society of America, November 19–23, 2004.
Performance-Based Measures of Physical Function for High-Function Populations
Article first published online: 12 APR 2006
Journal of the American Geriatrics Society
Volume 54, Issue 5, pages 737–742, May 2006
How to Cite
Curb, J. D., Ceria-Ulep, C. D., Rodriguez, B. L., Grove, J., Guralnik, J., Willcox, B. J., Donlon, T. A., Masaki, K. H. and Chen, R. (2006), Performance-Based Measures of Physical Function for High-Function Populations. Journal of the American Geriatrics Society, 54: 737–742. doi: 10.1111/j.1532-5415.2006.00700.x
- Issue published online: 2 MAY 2006
- Article first published online: 12 APR 2006
- physical performance;
- physical function;
- Japanese American
OBJECTIVES: To improve and broaden the applicability of performance-based measures of function for use in clinical and research settings.
DESIGN: Cross-sectional repeated-measures study.
SETTING: Research clinic.
PARTICIPANTS: Population-based sample of Japanese Americans without significant functional impairments aged 35 to 55 and 56 to 71 (N=203).
MEASUREMENTS: Performance-based measures of physical function, including range of standard tests, newer automated measures of balance and strength and data on cognitive function, lifestyle, medical history, and physical activity.
RESULTS: Of the nonplatform balance measures, only the one-leg stand was reliable (reliability coefficient (rc) =0.69) and able to discriminate between functional levels. Combining the Fourth National Health and Nutrition Examination Survey protocol of folded arm position while standing on a foam pad with the more-sophisticated balance platform test had the highest reliability and discrimination. With the strength chair, high rcs (0.88–0.96) were found for upper and lower extremity tests. Timed chair stands, a test of lower extremity and central strength were reliable. The 6-minute walk had a high rc (0.90).
CONCLUSION: Many performance tests used today are not reliable. Only a few discriminate between the most highly functioning individuals and individuals with good function. Thus, a new recommended battery includes unassisted single-leg stand, balance platform “foam pad, eyes closed,” elbow flexion and knee extension strength (strength chair), grip strength, timed chair stands, and the 6-minute walk. These simple performance-based tests have good reliability and discrimination across the range of function and can be used in most clinical and research settings to quickly assess global functional level.