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Determining Reliability of a Dual-Task Functional Mobility Protocol for Individuals With Lower Extremity Amputation
Susan W Hunter1, Courtney Frengopoulos2, Jeff Holmes3
1Department of Physical Medicine and Rehabilitation, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Ontario, Canada; School of Physical Therapy, University of Western Ontario, London, Ontario, Canada.
Archives of Physical Medicine and Rehabilitation
|January 11, 2018
Summary
This study found a dual-task functional mobility assessment to be reliable for individuals with lower extremity amputation. The L Test protocol effectively measures functional mobility and cognitive interaction in amputee populations.
Area of Science:
- Rehabilitation Medicine
- Biomedical Engineering
- Clinical Biomechanics
Background:
- Functional mobility is crucial for individuals with lower extremity amputation (LEA).
- Assessing functional mobility under dual-task conditions, which mimics real-world scenarios, is important.
- The reliability of dual-task assessments in LEA populations requires further investigation.
Purpose of the Study:
- To determine the relative and absolute reliability of a dual-task functional mobility assessment.
- To evaluate the L Test's performance under single- and dual-task conditions in individuals with LEA.
- To assess the interaction between cognitive function and functional mobility in this population.
Main Methods:
- A cross-sectional study was conducted with 60 individuals with LEA, stratified into three groups.
- Functional mobility was assessed using the L Test under single- and dual-task conditions (cognitive task: serial subtractions).
- Relative reliability was measured using intraclass correlation coefficients (ICCs), and absolute reliability was assessed using SEM and MDC95.
Main Results:
- Excellent relative reliability was observed across all three LEA groups (transtibial vascular, transtibial nonvascular, transfemoral/bilateral).
- Absolute reliability measures (SEM, MDC95) indicated consistent performance within groups.
- Bland-Altman plots confirmed systematic agreement between assessments, with no significant variations.
Conclusions:
- The dual-task L Test protocol demonstrates high reliability for assessing functional mobility in individuals with LEA.
- This assessment can be utilized in clinical and research settings to understand the interplay between cognition and mobility.
- The findings support the use of this dual-task assessment for evaluating individuals with lower extremity amputation.
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