Language:

Odds ratio product of sleep EEG as a continuous measure of sleep state

Sleep (New York, N.Y.), 2015-04, Vol.38 (4), p.641-654 [Peer Reviewed Journal]

2015 Associated Professional Sleep Societies, LLC. ;2015 Associated Professional Sleep Societies, LLC. 2015 ;ISSN: 0161-8105 ;EISSN: 1550-9109 ;DOI: 10.5665/sleep.4588 ;PMID: 25348125

Full text available

Actions
1. Add to My Research
2. Remove from My Research
3. E-mail
4. Print
5. Permalink
6. Citation
7. EasyBib
8. EndNote
9. RefWorks
10. Delicious
11. Export RIS
12. Export BibTeX

Title:
Odds ratio product of sleep EEG as a continuous measure of sleep state
Author: Younes, Magdy ; Ostrowski, Michele ; Soiferman, Marc ; Younes, Henry ; Younes, Mark ; Raneri, Jill ; Hanly, Patrick
Subjects: Adult ; Aged ; Aged, 80 and over ; Alberta ; Algorithms ; Arousal - physiology ; Brain Waves - physiology ; Electroencephalography ; Female ; Humans ; Male ; Manitoba ; Middle Aged ; Odds Ratio ; Odds Ratio Product of Sleep EEG as a Continuous Measure of Sleep State ; Polysomnography ; Reproducibility of Results ; Retrospective Studies ; Sleep - physiology ; Sleep Stages - physiology ; Wakefulness - physiology ; Young Adult
Is Part Of: Sleep (New York, N.Y.), 2015-04, Vol.38 (4), p.641-654
Description: To develop and validate an algorithm that provides a continuous estimate of sleep depth from the electroencephalogram (EEG). Retrospective analysis of polysomnograms. Research laboratory. 114 patients who underwent clinical polysomnography in sleep centers at the University of Manitoba (n = 58) and the University of Calgary (n = 56). None. Power spectrum of EEG was determined in 3-second epochs and divided into delta, theta, alpha-sigma, and beta frequency bands. The range of powers in each band was divided into 10 aliquots. EEG patterns were assigned a 4-digit number that reflects the relative power in the 4 frequency ranges (10,000 possible patterns). Probability of each pattern occurring in 30-s epochs staged awake was determined, resulting in a continuous probability value from 0% to 100%. This was divided by 40 (% of epochs staged awake) producing the odds ratio product (ORP), with a range of 0-2.5. In validation testing, average ORP decreased progressively as EEG progressed from wakefulness (2.19 ± 0.29) to stage N3 (0.13 ± 0.05). ORP < 1.0 predicted sleep and ORP > 2.0 predicted wakefulness in > 95% of 30-s epochs. Epochs with intermediate ORP occurred in unstable sleep with a high arousal index (> 70/h) and were subject to much interrater scoring variability. There was an excellent correlation (r(2) = 0.98) between ORP in current 30-s epochs and the likelihood of arousal or awakening occurring in the next 30-s epoch. Our results support the use of the odds ratio product (ORP) as a continuous measure of sleep depth.
Publisher: United States: Associated Professional Sleep Societies, LLC
Language: English
Identifier: ISSN: 0161-8105
EISSN: 1550-9109
DOI: 10.5665/sleep.4588
PMID: 25348125
Source: MEDLINE
Alma/SFX Local Collection

Back to results list


INSPIRE LIBRARY - TON DUC THANG UNIVERSITY	(84-028) 37 755 057	Feedback
19 Nguyen Huu Tho St. Dist.7, HCM	thuvien@tdtu.edu.vn	Feedback

Odds ratio product of sleep EEG as a continuous measure of sleep state

2015 Associated Professional Sleep Societies, LLC. ;2015 Associated Professional Sleep Societies, LLC. 2015 ;ISSN: 0161-8105 ;EISSN: 1550-9109 ;DOI: 10.5665/sleep.4588 ;PMID: 25348125

Searching Remote Databases, Please Wait