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Published on: July 22, 2019
Reliability and validity of the two-minute step test in patients with total knee arthroplasty
Hakan Akkan1, Ebru Kaya Mutlu2, Sabit Numan Kuyubasi3
1Department of Therapy and Rehabilitation, Tavsanli Vocational School of Health Services, Kutahya Health Sciences University, Tavsanli, Turkey.
Purpose:
To investigate the test-retest reliability and concurrent validity of 2MST for assessing the physical performance of patients with total knee arthroplasty (TKA).
Materials And Methods:
Fifty-one patients with TKA, aged more than 18 years, of both sexes, and underwent a primary TKA at least six months ago, were included in this study. The intraclass correlation coefficient (ICC) and 95% confidence interval (CI), standard error of measurement (SEM), and minimum detectable change at the 95% confidence level (MDC95) were used to determine the reliability of 2MST. In the validity, the correlations of the 2MST between the six-minute walk test (6MWT) and the two-minute walk test (2MWT) were assessed.
Results:
The reliability of 2MST was excellent (ICC = 0.97, SEM = 2.76, MDC95 = 7.6). There was a moderate correlation between 2MST and 6MWT (r = 0.586; p = 0.000), as well as between 2MST and 2MWT (r = 0.633; p = 0.000).
Conclusions:
2MST proved to be a reliable and valid physical performance test in patients with TKA. 2MST can be used to evaluate the physical performance of TKA patients.ClinicalTrials.gov Identifier: NCT05064943.
