Abstract
Purpose
This study reports the implementation of different regression (multivariate and step-wise) techniques towards determining the gait asymmetry and comparison with the symmetry indices (SI) values.
Methods
To predict the gait asymmetry between two different legs, a set of gait trials (thirty-five participants) via a three-dimensional motion capture setup and force platform available at the parent institute, has been acquired. Two separate regression fit models are prepared to indicate the significant gait parameters for the right and left legs utilizing the recorded foot data. The significant sets of coefficients for the right and left leg parameters are compared with the SI values to validate the gait asymmetry.
Results
The calculated mean SI from the experimental results correspond to the predicted regression model responses, and 18 of the 27 regression fits present different sets of significant coefficients for the right and left leg parameters.
Conclusion
The regression fits show gait parameter dependency on the different sets of predictor variables. The method can be adopted for different patient data sets to detect the influence of the causative factors on pathologic gait.
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Abbreviations
- Fz1, Fz0, Fz2 :
-
The peak and trough values of the vertical ground reaction forces of a normal healthy walking trial
- Fx1, Fx2 :
-
The peak and trough forces of the antero-posterior ground reaction forces
- AA1−2 :
-
The peak ankle angle values at 0–50% and 50–100% of gait cycle
- KA1−2 :
-
The peak knee angle values at 0–30% and 30–100% of gait cycle
- HA1−3 :
-
The peak hip angle values at 0–25%, 25–75% and 75–100% of gait cycle
- AM1−2 :
-
The peak ankle moment values at 0–30% and 30–70% of gait cycle
- KM1−3 :
-
The peak knee moment values at 0–30%, 20–60% and 40–100% of gait cycle
- HM1−2 :
-
The peak hip moment values at 0–30% and 30–70% of gait cycle
- AP1−2 :
-
The peak ankle power values at 0–25% and 25–75% of gait cycle
- KP1−3 :
-
The peak knee power values at 0–20%, 40–80% and 80–100% of gait cycle
- HP1−3 :
-
The peak knee power values at 0–30%, 30–60% and 60–100% of gait cycle
- x 1 to x 5 :
-
The coefficients corresponding to the independent variables (age, height, weight, leg length and walking speed respectively) for the multivariate and step-wise multivariate regression fits
- R 2 value:
-
A statistical measure of how close the data points are to the regression fits. Its values lie between 0 to 1 (or 0–100%), 1 representing the ideal situation wherein all the data points lie on the fitted line
- p-value:
-
Statistical significance of the data (smaller the p-value, greater the significance)
- F-value:
-
The variance of the data for the predicted model
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Acknowledgement
This study was supported by Centre of Excellence—Orthopaedic Tissue Engineering and Rehabilitation, under TEQIP II (Sanction order No. AC/TEQIP-II/CoE/13/603 dated 24th June 2013).
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Jena, S., Sakhare, G.M., Panda, S.K. et al. Implementation of Multiple Regression Technique for Detection of Gait Asymmetry Using Experimental Gait Data. J. Med. Biol. Eng. 41, 1–10 (2021). https://doi.org/10.1007/s40846-020-00533-8
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DOI: https://doi.org/10.1007/s40846-020-00533-8