DocumentCode :
3685170
Title :
Estimation of sleep status in sleep apnea patients using a novel head actigraphy technique
Author :
Richard Hummel;T. Douglas Bradley;Geoff R. Fernie;S.J. Isaac Chang;Hisham Alshaer
Author_Institution :
Sleep Research Laboratory, Toronto Rehab Ins, UHN, Toronto, ON, Canada
fYear :
2015
Firstpage :
5416
Lastpage :
5419
Abstract :
Polysomnography is a comprehensive modality for diagnosing sleep apnea (SA), but it is expensive and not widely available. Several technologies have been developed for portable diagnosis of SA in the home, most of which lack the ability to detect sleep status. Wrist actigraphy (accelerometry) has been adopted to cover this limitation. However, head actigraphy has not been systematically evaluated for this purpose. Therefore, the aim of this study was to evaluate the ability of head actigraphy to detect sleep/wake status. We obtained full overnight 3-axis head accelerometry data from 75 sleep apnea patient recordings. These were split into training and validation groups (2:1). Data were preprocessed and 5 features were extracted. Different feature combinations were fed into 3 different classifiers, namely support vector machine, logistic regression, and random forests, each of which was trained and validated on a different subgroup. The random forest algorithm yielded the highest performance, with an area under the receiver operating characteristic (ROC) curve of 0.81 for detection of sleep status. This shows that this technique has a very good performance in detecting sleep status in SA patients despite the specificities in this population, such as respiration related movements.
Keywords :
"Sleep apnea","Feature extraction","Electroencephalography","Magnetic heads","Wrist","Support vector machines"
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2015 37th Annual International Conference of the IEEE
ISSN :
1094-687X
Electronic_ISBN :
1558-4615
Type :
conf
DOI :
10.1109/EMBC.2015.7319616
Filename :
7319616
Link To Document :
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