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Assessing functional mobility after lower limb reconstruction: a psychometric evaluation of a sensor-based mobility
Richard M Kwasnicki1, Shehan Hettiaratchy, Delaram Jarchi
1*Hamlyn Centre, Institute of Global Health Innovation, Imperial College London, London, United Kingdom; and †Imperial College Healthcare NHS Trust, London, United Kingdom.
Annals of Surgery
|October 28, 2014
Summary
The Hamlyn Mobility Score (HMS), a new tool using wearable sensors, reliably and validly assesses mobility after lower limb reconstruction. It offers a better way to track patient progress and improve rehabilitation.
Area of Science:
- Biomedical Engineering: Development of wearable sensor technology for objective health assessments.
- Orthopedics: Evaluating functional outcomes in lower limb reconstruction surgery.
Background:
- Limb salvage surgery advances necessitate better outcome evaluation methods.
- Current functional mobility assessments lack objectivity and may hinder optimal rehabilitation planning.
Purpose of the Study:
- To develop and validate the Hamlyn Mobility Score (HMS), an objective mobility assessment tool.
- To utilize wearable motion sensor technology for enhanced functional mobility evaluation.
Main Methods:
- Prospective cohort study involving 20 lower limb reconstruction patients and 10 controls.
- Utilized an ear-worn accelerometer to capture kinematic data during the HMS protocol.
- Collected demographic, clinical data, and SF-36 scores; conducted psychometric evaluation for reliability and validity.
Main Results:
- The HMS demonstrated excellent reliability (ICC >0.90) and internal consistency (Cronbach α = 0.897).
- Concurrent validity was confirmed through correlation with SF-36 scores (ρ = 0.666, P = 0.005).
- HMS showed significant differences between patient and control groups and was 50% more responsive than SF-36.
Conclusions:
- The Hamlyn Mobility Score (HMS) is a reliable and valid tool for objective mobility assessment.
- HMS can support personalized rehabilitation programs and improve reconstructive service evaluation.
- This tool facilitates better patient outcomes in lower limb reconstruction.
