Evidence map›Paper›PMID 30996721›Full record

ArticleGerman medical science : GMS e-journal2019

Automated sleep stage classification based on tracheal body sound and actigraphy.

Christoph Kalkbrenner, Rainer Brucher, Tibor Kesztyüs, Manuel Eichenlaub, Wolfgang Rottbauer, Dominik Scharnbeck

Open access · greenAbstract read
In one paragraph

Article in German medical science : GMS e-journal, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 2 pooled it
1.6field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 2 syntheses or guidelines pooled it, 20 citations in OpenAlex.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Christoph KalkbrennerFaculty of Medical Engineering, University of Applied Science Ulm, Germany.
Rainer BrucherFaculty of Medical Engineering, University of Applied Science Ulm, Germany.
Tibor KesztyüsInstitute of Medical Systems Biology, University Ulm, Germany.
Manuel EichenlaubSchool of Engineering, University of Warwick, Coventry, United Kingdom.
Wolfgang RottbauerDepartment of Internal Medicine II, University Hospital Ulm, Germany.
Dominik ScharnbeckDepartment of Internal Medicine II, University Hospital Ulm, Germany.
Universität Ulm · DEUniversity Hospital Ulm · DEUniversity of Warwick · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The current gold standard for assessment of most sleep disorders is the in-laboratory polysomnography (PSG). This approach produces high costs and inconveniences for the patients. An accessible and simple preliminary screening method to diagnose the most common sleep disorders and to decide whether a PSG is necessary or not is therefore desirable. A minimalistic type-4 monitoring system which utilized tracheal body sound and actigraphy to accurately diagnose the obstructive sleep apnea syndrome was previously developed. To further improve the diagnostic ability of said system, this study aims to examine if it is possible to perform automated sleep staging utilizing body sound to extract cardiorespiratory features and actigraphy to extract movement features. A linear discriminant classifier based on those features was used for automated sleep staging using the type-4 sleep monitor. For validation 53 subjects underwent a full-night screening at Ulm University Hospital using the developed sleep monitor in addition to polysomnography. To assess sleep stages from PSG, a trained technician manually evaluated EEG, EOG, and EMG recordings. The classifier reached 86.9% accuracy and a Kappa of 0.69 for sleep/wake classification, 76.3% accuracy and a Kappa of 0.42 for Wake/REM/NREM classification, and 56.5% accuracy and a Kappa of 0.36 for Wake/REM/light sleep/deep sleep classification. For the calculation of sleep efficiency (SE), a coefficient of determination r

Indexed as

ActigraphyRespiratory SoundsSleep StagesAutomationFemaleHumansMaleMiddle AgedPolysomnographySleep Apnea, ObstructiveTracheamonitoringmovement analysisrespiratory soundssleep staging

Identifiers

PMID30996721
PMCPMC6449867
OpenAlexW2992258425

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.