Metrics for Performance Evaluation of Patient Exercises during Physical Therapy
- *Corresponding Author:
- Aleksandar Vakanski
University of Idaho
1776 Science Center Drive
TAB 309, Idaho Falls, ID, 83402, USA
E-mail: [email protected]
Received Date: April 01, 2017; Accepted Date: April 17, 2017; Published Date: April 20, 2017
Citation: Vakanski A, Ferguson JM, Lee S (2017) Metrics for Performance Evaluation of Patient Exercises during Physical Therapy. Int J Phys Med Rehabil 5:403. doi: 10.4172/2329-9096.1000403
Copyright: © 2017 Vakanski A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Objective: The article proposes a set of metrics for evaluation of patient performance in physical therapy exercises. Methods: Taxonomy is employed that classifies the metrics into quantitative and qualitative categories, based on the level of abstraction of the captured motion sequences. Further, the quantitative metrics are classified into modelless and model-based metrics, in reference to whether the evaluation employs the raw measurements of patient performed motions, or whether the evaluation is based on a mathematical model of the motions. The reviewed metrics include root-mean square distance, Kullback Leibler divergence, log-likelihood, heuristic consistency, Fugl-Meyer Assessment, and similar. Results: The metrics are evaluated for a set of five human motions captured with a Kinect sensor. Conclusion: The metrics can potentially be integrated into a system that employs machine learning for modelling and assessment of the consistency of patient performance in home-based therapy setting. Automated performance evaluation can overcome the inherent subjectivity in human performed therapy assessment, and it can increase the adherence to prescribed therapy plans, and reduce healthcare costs.