title: Machine learning for large-scale wearable sensor data in Parkinson's disease: Concepts, promises, pitfalls, and futures.
abstract: For the treatment and monitoring of Parkinson's disease (PD) to be scientific, a key requirement is that measurement of disease stages and severity is quantitative, reliable, and repeatable. The last 50 years in PD research have been dominated by qualitative, subjective ratings obtained by human interpretation of the presentation of disease signs and symptoms at clinical visits. More recently, "wearable," sensor-based, quantitative, objective, and easy-to-use systems for quantifying PD signs for large numbers of participants over extended durations have been developed. This technology has the potential to significantly improve both clinical diagnosis and management in PD and the conduct of clinical studies. However, the large-scale, high-dimensional character of the data captured by these wearable sensors requires sophisticated signal processing and machine-learning algorithms to transform it into scientifically and clinically meaningful information. Such algorithms that "learn" from data have shown remarkable success in making accurate predictions for complex problems in which human skill has been required to date, but they are challenging to evaluate and apply without a basic understanding of the underlying logic on which they are based. This article contains a nontechnical tutorial review of relevant machine-learning algorithms, also describing their limitations and how these can be overcome. It discusses implications of this technology and a practical road map for realizing the full potential of this technology in PD research and practice. © 2016 International Parkinson and Movement Disorder Society.
authors: Department of Data Science, tranSMART Foundation, Wakefield, Massachusetts, USA. Ken.Kubota@transmartfoundation.org.
authors: Ken J
authors: KJ
authors: Kubota
authors: Verge Genomics, San Francisco, California, USA.|Interdepartmental Program in Bioinformatics, University of California at Los Angeles, Los Angeles, California, USA.
authors: Jason A
authors: JA
authors: Chen
authors: Aston University, Aston Triangle, Birmingham, United Kingdom.|Media Lab, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
authors: Max A
authors: MA
authors: Little
mesh_terms: D003627:Data Interpretation, Statistical; D006801:Humans; D000069550:Machine Learning; D018670:Monitoring, Ambulatory / Q000706:statistics & numerical data*; D010300:Parkinson Disease / Q000175:diagnosis*
keywords: artificial intelligence; data science; digital sensors; machine learning; wearables