Automatic Analysis of Single-channel Sleep EEG: Validation in Healthy Individuals

Overview

Journal Sleep

Publisher Oxford University Press

Specialty Psychiatry

Date 2007 Nov 29

PMID 18041491

Citations 69

Authors

Christian Berthomier

Xavier Drouot

Maria Herman-Stoica

Pierre Berthomier

Jacques Prado

Djibril Bokar-Thire

Odile Benoit

Jeremie Mattout

Marie-Pia dOrtho

Affiliations

Soon will be listed here.

Abstract

Study Objective: To assess the performance of automatic sleep scoring software (ASEEGA) based on a single EEG channel comparatively with manual scoring (2 experts) of conventional full polysomnograms.

Design: Polysomnograms from 15 healthy individuals were scored by 2 independent experts using conventional R&K rules. The results were compared to those of ASEEGA scoring on an epoch-by-epoch basis.

Setting: Sleep laboratory in the physiology department of a teaching hospital.

Participants: Fifteen healthy volunteers.

Measurements And Results: The epoch-by-epoch comparison was based on classifying into 2 states (wake/sleep), 3 states (wake/REM/ NREM), 4 states (wake/REM/stages 1-2/SWS), or 5 states (wake/REM/ stage 1/stage 2/SWS). The obtained overall agreements, as quantified by the kappa coefficient, were 0.82, 0.81, 0.75, and 0.72, respectively. Furthermore, obtained agreements between ASEEGA and the expert consensual scoring were 96.0%, 92.1%, 84.9%, and 82.9%, respectively. Finally, when classifying into 5 states, the sensitivity and positive predictive value of ASEEGA regarding wakefulness were 82.5% and 89.7%, respectively. Similarly, sensitivity and positive predictive value regarding REM state were 83.0% and 89.1%.

Conclusions: Our results establish the face validity and convergent validity of ASEEGA for single-channel sleep analysis in healthy individuals. ASEEGA appears as a good candidate for diagnostic aid and automatic ambulant scoring.

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