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Title: 5-repetition sit-to-stand test in subjects with chronic stroke : reliability and validity
Authors: Mong, Y
Teo, TW
Ng, SS
Keywords: Muscle strength
Issue Date: 2010
Publisher: W.B. Saunders
Source: Archives of physical medicine and rehabilitation, 2010, v. 91, no. 3, p. 407-413 How to cite?
Journal: Archives of physical medicine and rehabilitation 
Abstract: Objectives: To examine the (1) intrarater, interrater, and test-retest reliability of the 5-repetition sit-to-stand test (5-repetition STS test) scores, (2) correlation of 5-repetition STS test scores with lower-limb muscle strength and balance performance, and (3) cut-off scores among the 3 groups of subjects: the young, the healthy elderly, and subjects with stroke.
Design: Cross-sectional study.
Setting: University-based rehabilitation center.
Participants: A convenience sample of 36 subjects: 12 subjects with chronic stroke, 12 healthy elderly subjects, and 12 young subjects.
Interventions: Not applicable.
Main Outcome Measures: 5-Repetition STS test time scores; hand-held dynamometer measurements of hip flexors, and knee flexors and extensors; ankle dorsiflexors and plantarflexors muscle strength; Berg Balance Scale (BBS); and limits of stability (LOS) test using dynamic posturography.
Results: Excellent intrarater reliability of intraclass correlation coefficient (ICC) (range, .970–.976), interrater reliability (ICC=.999), and test-retest reliability (ICC range, .989–.999) were found. Five-repetition STS test scores were also found to be significantly associated with the muscle strength of affected and unaffected knee flexors (ρ=–.753 to –.830; P<.00556) of the subjects with stroke. No significant associations were found between 5-repetition STS test and BBS and LOS tests in subjects with stroke. Cut-off scores of 12 seconds were found to be discriminatory between healthy elderly and subjects with stroke at a sensitivity of 83% and specificity of 75%.
Conclusions: The 5-repetition STS test is a reliable measurement tool that correlates with knee flexors muscle strength but not balance ability in subjects with stroke.
ISSN: 0003-9993
EISSN: 1532-821X
DOI: 10.1016/j.apmr.2009.10.030
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