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Evaluation of multi-segmental kinematic modelling in the paediatric foot using three concurrent foot models
Ryan Mahaffey1, Stewart C Morrison, Wendy I Drechsler
1School of Health, Sport and Bioscience, University of East London, Stratford, London E15 4LZ, England. r.mahaffey@uel.ac.uk.
Journal of Foot and Ankle Research
|November 2, 2013
Summary
This study evaluated the repeatability of three foot models in assessing paediatric gait. The Oxford Foot Model and 3DFoot showed better reliability for clinical use in children
Area of Science:
- Biomechanics
- Pediatric Gait Analysis
- Motion Capture Technology
Background:
- Selecting appropriate foot models for gait analysis is challenging.
- Clinical utility depends on data repeatability and understanding measurement error.
- Paediatric foot kinematic assessment is difficult, with limited data on multi-segment models.
Purpose of the Study:
- To evaluate three foot models: 3DFoot, Kinfoot, and Oxford Foot Model (OFM).
- To establish concurrent test-retest repeatability for paediatric foot motion during gait.
Main Methods:
- Concurrent application of 3DFoot, Kinfoot, and OFM to 14 children's right feet.
- Extraction of angular data at gait cycle events and peaks.
- Comparison of data between two sessions using Intraclass Correlation Coefficient (ICC) and Standard Error of Measurement (SEM).
Main Results:
- All models showed moderate repeatability (OFM: ICC 0.55, 3DFoot: ICC 0.47, Kinfoot: ICC 0.43).
- OFM (SEM 4.61°) and 3DFoot (SEM 3.88°) had acceptable mean error (<5°), unlike Kinfoot (SEM 5.08°).
- Repeatability varied by segment, with Kinfoot showing the lowest reliability.
Conclusions:
- Segmental foot kinematics are repeatable in paediatric gait.
- Repeatability and error levels differ across foot models and segments.
- This data can inform clinical assessments and improve understanding of paediatric foot motion.
