5-Repetition Sit-to-Stand Test in Subjects With Chronic Stroke: Reliability and Validity |
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Authors: | Yiqin Mong Tilda W Teo Shamay S Ng |
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Institution: | a Department of Physiotherapy, Tan Tock Seng Hospital, Singapore b Inpatient Therapy Services, St Andrew's Community Hospital, Singapore c Department of Rehabilitation Sciences, Hong Kong Polytechnic University, Hong Kong (SAR), China |
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Abstract: | Mong Y, Teo TW, Ng SS. 5-repetition sit-to-stand test in subjects with chronic stroke: reliability and validity.ObjectivesTo 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.DesignCross-sectional study.SettingUniversity-based rehabilitation center.ParticipantsA convenience sample of 36 subjects: 12 subjects with chronic stroke, 12 healthy elderly subjects, and 12 young subjects.InterventionsNot applicable.Main Outcome Measures5-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.ResultsExcellent 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%.ConclusionsThe 5-repetition STS test is a reliable measurement tool that correlates with knee flexors muscle strength but not balance ability in subjects with stroke. |
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Keywords: | Muscle strength Rehabilitation Stroke |
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