Andrew Sawers1, Janis Kim2, Geoff Balkman3, Brian Hafner4. 1. Department of Kinesiology, University of Illinois at Chicago, 1919 W. Taylor Street, Chicago, IL 60612 (USA). 2. Department of Kinesiology, University of Illinois at Chicago. 3. Department of Rehabilitation Medicine, University of Washington, Seattle, Washington. 4. Department of Rehabilitation Medicine, University of Washington.
Abstract
OBJECTIVE: A major barrier to reducing falls among users of lower limb prostheses (LLP) has been an absence of statistical indices required for clinicians to select and interpret scores from performance-based clinical tests. The study aimed to derive estimates of reliability, measurement error, and minimal detectable change values in performance-based clinical tests administered to unilateral LLP users. METHODS: 60 unilateral LLP users were administered the Narrowing Beam Walking Test (NBWT), Timed Up and Go (TUG), Four Square Step Test (FSST), and 10-meter Walk Test (10mWT) on 2 occasions, 3 to 9 days apart. Intraclass correlation coefficients (ICC) were calculated to assess interrater and test-retest reliability, while standard error of measurement (SEM) and minimal detectable change (MDC90) were derived to establish estimates of measurement error in individual scores or changes in score for each test. RESULTS: Interrater reliability ICCs (1,1) were high for all tests (ie, ≥ 0.98). Test-retest ICCs (2,1) varied by test, ranging from .88 for the TUG, to .97 for the FSST. SEM and MDC90 varied between .39-.96, and .91 s-2.2 s for the time-based tests (FSST, TUG, 10mWT). SEM and MDC90 for the NBWT were .07 and .16, respectively. CONCLUSION: With the exception of the TUG, studied tests had test-retest ICCs (2,1) that exceeded the minimum required threshold to be considered suitable for group- and individual-level applications (ie, ICC ≥ 0.70 and ICC ≥ 0.90, respectively). Future research on individuals with dysvascular and transfemoral amputations, or in specific age categories is required.
OBJECTIVE: A major barrier to reducing falls among users of lower limb prostheses (LLP) has been an absence of statistical indices required for clinicians to select and interpret scores from performance-based clinical tests. The study aimed to derive estimates of reliability, measurement error, and minimal detectable change values in performance-based clinical tests administered to unilateral LLP users. METHODS: 60 unilateral LLP users were administered the Narrowing Beam Walking Test (NBWT), Timed Up and Go (TUG), Four Square Step Test (FSST), and 10-meter Walk Test (10mWT) on 2 occasions, 3 to 9 days apart. Intraclass correlation coefficients (ICC) were calculated to assess interrater and test-retest reliability, while standard error of measurement (SEM) and minimal detectable change (MDC90) were derived to establish estimates of measurement error in individual scores or changes in score for each test. RESULTS: Interrater reliability ICCs (1,1) were high for all tests (ie, ≥ 0.98). Test-retest ICCs (2,1) varied by test, ranging from .88 for the TUG, to .97 for the FSST. SEM and MDC90 varied between .39-.96, and .91 s-2.2 s for the time-based tests (FSST, TUG, 10mWT). SEM and MDC90 for the NBWT were .07 and .16, respectively. CONCLUSION: With the exception of the TUG, studied tests had test-retest ICCs (2,1) that exceeded the minimum required threshold to be considered suitable for group- and individual-level applications (ie, ICC ≥ 0.70 and ICC ≥ 0.90, respectively). Future research on individuals with dysvascular and transfemoral amputations, or in specific age categories is required.
Authors: Mayank Seth; Emma Haldane Beisheim; Ryan Todd Pohlig; John Robert Horne; Frank Bernard Sarlo; Jaclyn Megan Sions Journal: Am J Phys Med Rehabil Date: 2022-01-01 Impact factor: 2.159
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Authors: Sara J Morgan; Kimberly Rowe; Chantelle C Fitting; Ignacio A Gaunaurd; Anat Kristal; Geoffrey S Balkman; Rana Salem; Alyssa M Bamer; Brian J Hafner Journal: Arch Phys Med Rehabil Date: 2022-04-06 Impact factor: 4.060
Authors: Mayank Seth; Emma H Beisheim-Ryan; Ryan T Pohlig; John Robert Horne; Gregory E Hicks; Jaclyn M Sions Journal: Arch Rehabil Res Clin Transl Date: 2021-10-12