Computer-assisted analysis of routine electroencephalogram to identify hidden biomarkers of epilepsy: protocol for a systematic review

Author:

Lemoine ÉmileORCID,Neves Briard JoelORCID,Rioux Bastien,Podbielski Renata,Nauche Bénédicte,Toffa Denahin,Keezer Mark,Lesage Frédéric,Nguyen Dang K,Bou Assi Elie

Abstract

IntroductionThe diagnosis of epilepsy frequently relies on the visual interpretation of the electroencephalogram (EEG) by a neurologist. The hallmark of epilepsy on EEG is the interictal epileptiform discharge (IED). This marker lacks sensitivity: it is only captured in a small percentage of 30 min routine EEGs in patients with epilepsy. In the past three decades, there has been growing interest in the use of computational methods to analyse the EEG without relying on the detection of IEDs, but none have made it to the clinical practice. We aim to review the diagnostic accuracy of quantitative methods applied to ambulatory EEG analysis to guide the diagnosis and management of epilepsy.Methods and analysisThe protocol complies with the recommendations for systematic reviews of diagnostic test accuracy by Cochrane. We will search MEDLINE, EMBASE, EBM reviews, IEEE Explore along with grey literature for articles, conference papers and conference abstracts published after 1961. We will include observational studies that present a computational method to analyse the EEG for the diagnosis of epilepsy in adults or children without relying on the identification of IEDs or seizures. The reference standard is the diagnosis of epilepsy by a physician. We will report the estimated pooled sensitivity and specificity, and receiver operating characteristic area under the curve (ROC AUC) for each marker. If possible, we will perform a meta-analysis of the sensitivity and specificity and ROC AUC for each individual marker. We will assess the risk of bias using an adapted QUADAS-2 tool. We will also describe the algorithms used for signal processing, feature extraction and predictive modelling, and comment on the reproducibility of the different studies.Ethics and disseminationEthical approval was not required. Findings will be disseminated through peer-reviewed publication and presented at conferences related to this field.PROSPERO registration numberCRD42022292261.

Funder

Canadian Institutes of Health Research

Canada Research Chairs

Natural Sciences and Engineering Research Council of Canada

Institut de Valorisation des Données

Publisher

BMJ

Subject

General Medicine

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