The sit-to-stand (STS) task, an important activity required to maintain functional independence, can be used to assess physical performance. The purpose of this study was to determine the interrater reliability of the five-times-sit-to-stand test (FTSTS). Ninety-two subjects, mean age of 65 years, performed the FTSTS without the use of the upper extremities. A video recording of each subject’s performance was independently assessed to determine the test completion time by three clinicians with similar education and years of clinical experience. An intraclass correlation coefficient (ICC2,1) was used to determine the interrater reliability of the FTSTS. Statistical analysis revealed excellent interrater reliability among all three researchers: ICC = 1.000. When clinicians with equal education and clinical experience administer the FTSTS, it has excellent interrater reliability.
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