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Radar-based sleep stage classification in children undergoing polysomnography

a pilot-study

Journal Article (2021)
Author(s)

R. de Goederen (Erasmus MC, Wilhelmina Children's Hospital)

S Pu (Eindhoven University of Technology)

M. Silos Viu (Student TU Delft)

D. Doan (Wilhelmina Children's Hospital)

S. Overeem (Sleep Medicine Center Kempenhaeghe, Eindhoven University of Technology)

W.A. Serdijn (TU Delft - Bio-Electronics)

K.F.M. Joosten (Erasmus MC)

X. Long (Eindhoven University of Technology)

J Dudink (Wilhelmina Children's Hospital)

Research Group
Bio-Electronics
Copyright
© 2021 R. de Goederen, S. Pu, M. Silos Viu, D. Doan, S. Overeem, W.A. Serdijn, K. F.M. Joosten, X. Long, J. Dudink
DOI related publication
https://doi.org/10.1016/j.sleep.2021.03.022
More Info
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Publication Year
2021
Language
English
Copyright
© 2021 R. de Goederen, S. Pu, M. Silos Viu, D. Doan, S. Overeem, W.A. Serdijn, K. F.M. Joosten, X. Long, J. Dudink
Research Group
Bio-Electronics
Volume number
82
Pages (from-to)
1-8
Reuse Rights

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Abstract

Study objectives: Unobtrusive monitoring of sleep and sleep disorders in children presents challenges. We investigated the possibility of using Ultra-Wide band (UWB) radar to measure sleep in children. Methods: Thirty-two children scheduled to undergo a clinical polysomnography participated; their ages ranged from 2 months to 14 years. During the polysomnography, the children's body movements and breathing rate were measured by an UWB-radar. A total of 38 features were calculated from the motion signals and breathing rate obtained from the raw radar signals. Adaptive boosting was used as machine learning classifier to estimate sleep stages, with polysomnography as gold standard method for comparison. Results: Data of all participants combined, this study achieved a Cohen's Kappa coefficient of 0.67 and an overall accuracy of 89.8% for wake and sleep classification, a Kappa of 0.47 and an accuracy of 72.9% for wake, rapid-eye-movement (REM) sleep, and non-REM sleep classification, and a Kappa of 0.43 and an accuracy of 58.0% for wake, REM sleep, light sleep and deep sleep classification. Conclusion: Although the current performance is not sufficient for clinical use yet, UWB radar is a promising method for non-contact sleep analysis in children.