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Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder
Published on: March 4, 2018
The GDI-Kinetic: a new index for quantifying kinetic deviations from normal gait
Adam Rozumalski1, Michael H Schwartz
1Gillette Children's Specialty Healthcare, St. Paul, MN 55101, United States. arozumalski@gillettechildrens.com
Gait & Posture
|April 2, 2011
Summary
The new GDI-Kinetic index measures gait pathology using joint kinetics, offering a statistically robust alternative to the GDI. It complements existing gait analysis tools for a more comprehensive assessment.
Area of Science:
- Biomechanics
- Gait Analysis
- Clinical Assessment
Background:
- The Gait Deviation Index (GDI) is a kinematic measure of gait pathology.
- A kinetic-based index is needed for a more comprehensive gait assessment.
Purpose of the Study:
- Introduce the GDI-Kinetic, a novel index based on joint kinetics.
- Validate the GDI-Kinetic against existing measures like the GDI and Gillette Functional Assessment Questionnaire Walking Scale (FAQ).
- Assess the GDI-Kinetic's utility in classifying Cerebral Palsy (CP) subtypes.
Main Methods:
- Singular value decomposition (SVD) to identify features in raw gait kinetic data.
- Linear combination of features to reconstruct gait data (91% fidelity with 20 features).
- Calculation and transformation of the difference between subject and control data for a statistically sound measure.
Main Results:
- The GDI-Kinetic is linearly related to the GDI (r²=0.24).
- GDI-Kinetic correlates with FAQ levels and distinguishes between them.
- GDI-Kinetic shows scaling with clinical severity in various CP topographic classifications.
Conclusions:
- The GDI-Kinetic provides a valid and reliable measure of gait pathology.
- It complements the GDI, offering a more complete picture of gait dysfunction.
- The GDI-Kinetic is a valuable tool for assessing gait in children with CP.
