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Journal article

Statistical machine learning of sleep and physical activity phenotypes from sensor data in 96,220 UK Biobank participants

Abstract:
Current public health guidelines on physical activity and sleep duration are limited by a reliance on subjective self-reported evidence. Using data from simple wrist-worn activity monitors, we developed a tailored machine learning model, using balanced random forests with Hidden Markov Models, to reliably detect a number of activity modes. We show that physical activity and sleep behaviours can be classified with 87% accuracy in 159,504 minutes of recorded free-living behaviours from 132 adults. These trained models can be used to infer fine resolution activity patterns at the population scale in 96,220 participants. For example, we find that men spend more time in both low- and high- intensity behaviours, while women spend more time in mixed behaviours. Walking time is highest in spring and sleep time lowest during the summer. This work opens the possibility of future public health guidelines informed by the health consequences associated with specific, objectively measured, physical activity and sleep behaviours.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1038/s41598-018-26174-1

Authors


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Institution:
University of Oxford
Department:
Statistics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Statistics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MSD
Department:
Nuffield Department of Population Health
Sub department:
Population Health
Role:
Author



Publisher:
Nature Publishing Group
Journal:
Scientific Reports More from this journal
Volume:
8
Article number:
7961
Publication date:
2018-05-21
Acceptance date:
2018-05-02
DOI:
EISSN:
2045-2322


Language:
English
Pubs id:
pubs:853004
UUID:
uuid:dde47b05-a0bc-428d-890d-cd3ca7e46860
Local pid:
pubs:853004
Deposit date:
2018-05-21

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