Journal article
Machine learning to quantify habitual physical activity in children with cerebral palsy
Developmental Medicine and Child Neurology, Vol.62(9), pp.1054-1060
2020
PMID: 32420632
Abstract
Aim
To investigate whether activity-monitors and machine learning models could provide accurate information about physical activity performed by children and adolescents with cerebral palsy (CP) who use mobility aids for ambulation.
Method
Eleven participants (mean age 11y [SD 3y]; six females, five males) classified in Gross Motor Function Classification System (GMFCS) levels III and IV, completed six physical activity trials wearing a tri-axial accelerometer on the wrist, hip, and thigh. Trials included supine rest, upper-limb task, walking, wheelchair propulsion, and cycling. Three supervised learning algorithms (decision tree, support vector machine [SVM], random forest) were trained on features in the raw-acceleration signal. Model-performance was evaluated using leave-one-subject-out cross-validation accuracy.
Results
Cross-validation accuracy for the single-placement models ranged from 59% to 79%, with the best performance achieved by the random forest wrist model (79%). Combining features from two or more accelerometer placements significantly improved classification accuracy. The random forest wrist and hip model achieved an overall accuracy of 92%, while the SVM wrist, hip, and thigh model achieved an overall accuracy of 90%.
Interpretation
Models trained on features in the raw-acceleration signal may provide accurate recognition of clinically relevant physical activity behaviours in children and adolescents with CP who use mobility aids for ambulation in a controlled setting.
Details
- Title
- Machine learning to quantify habitual physical activity in children with cerebral palsy
- Authors
- Benjamin Goodlich (Corresponding Author) - Griffith UniversityEllen L. Armstrong - Griffith UniversitySean A. Horan - Griffith UniversityEmmah Baque - Griffith UniversityChristopher P. Carty - Griffith UniversityMatthew N. Ahmadi - Queensland University of TechnologyStewart G. Trost - Queensland University of Technology
- Publication details
- Developmental Medicine and Child Neurology, Vol.62(9), pp.1054-1060
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Date published
- 2020
- DOI
- 10.1111/dmcn.14560
- ISSN
- 1469-8749
- PMID
- 32420632
- Organisation Unit
- School of Health - Sports & Exercise Science
- Language
- English
- Record Identifier
- 991080582602621
- Output Type
- Journal article
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