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01-05-2016 | Sleep Breathing Physiology and Disorders • Original Article

Diagnostic validity of the use of a portable single-channel electromyography device for sleep bruxism

Authors: Juliana Stuginski-Barbosa, André Luís Porporatti, Yuri Martins Costa, Peter Svensson, Paulo César Rodrigues Conti

Published in: Sleep and Breathing | Issue 2/2016

Abstract

Purpose

The aim of this study was to determine an appropriate cutoff value and the number of nights of sleep with the portable single-channel EMG device (GrindCare) necessary for a valid sleep bruxism (SB) diagnosis.

Methods

Twenty consecutive post-graduate students and staff at Bauru School of Dentistry composed the sample. Each participant underwent the GrindCare for five consecutive nights and the polysomnography (PSG). The discrimination between bruxers and non-bruxers was based only on the PSG analysis. Data about electromyography per hour with GrindCare (EMG/h) and PSG (bursts/h) were scored.

Results

There were positive correlations between the two devices for EMG/h and bursts/h in three and five consecutive nights. Bland-Altman analysis of the EMG bursts/h showed positive agreement between the methods. The receiver operating characteristic (ROC) analyses also showed that using a minimum of 18 EMG/h for three nights and 19 EMG/h for five nights in GrindCare as cutoffs resulted in a 90 % specificity and positive likelihood ratio equal to 5.

Conclusions

GrindCare is able to discriminate SB diagnosed by PSG and gold standard criteria, when used for three or five consecutive nights, and it may be a valid choice in clinical practice for SB assessment.

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Title: Diagnostic validity of the use of a portable single-channel electromyography device for sleep bruxism
Authors: Juliana Stuginski-Barbosa
André Luís Porporatti
Yuri Martins Costa
Peter Svensson
Paulo César Rodrigues Conti
Publication date: 01-05-2016
Publisher: Springer Berlin Heidelberg
Published in: Sleep and Breathing / Issue 2/2016
Print ISSN: 1520-9512
Electronic ISSN: 1522-1709
DOI: https://doi.org/10.1007/s11325-015-1283-y

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