The Test-retest Reliability and Concurrent Validity of the Figure of Eight Walk Test and the 360° Turn Test

Beyond Straight Lines: The Test-retest Reliability and Concurrent Validity of the Figure of Eight Walk Test and the 360° Turn Test in Patients With Total Hip Arthroplasty

To the best of the authors' knowledge, there are no existing studies that have evaluated the reliability and validity of the Figure-of-Eight Walk Test (F8WT) and the 360° Turn Test (360°TT) specifically in patients with total hip arthroplasty (PwTHA). The objective of this investigation was to assess the test-retest reliability and concurrent validity of the F8WT and 360°TT within this patient population.

This study involves a cross-sectional design with 54 unilateral PwTHA cases. Assessments to be conducted during the first session include the F8WT, 360°TT, Timed Up and Go (TUG), and Harris Hip Score (HHS). Subsequently, the F8WT and 360°TT will be retested one hour after the initial test. The reliability of these tests will be determined using the intraclass correlation coefficient (ICC). Concurrent validity will be assessed using the Pearson correlation coefficient. Additionally, the standard error of measurement (SEM95) and minimum detectable change (MDC95) will be calculated for the F8WT and 360°TT.

Inclusion Criteria:

• surgery performed at least 6 months prior;
• unilateral total hip arthroplasty;
• patients who scored at least 24 points on the Mini-Mental State Examination (MMSE).

Exclusion Criteria:

• a history of additional surgery on the lower extremities;
• bilateral THA or revision surgery;
• severe neurological or orthopedic conditions that may influence musculoskeletal mobility or walking;
• body mass index (BMI) of 40 kg/m² or higher;
• lack of consent to participate in the study.