Evidence map›Paper›PMID 34386736›Full record

ArticleEClinicalMedicine2021

Seizure likelihood varies with day-to-day variations in sleep duration in patients with refractory focal epilepsy: A longitudinal electroencephalography investigation.

Katrina L Dell, Daniel E Payne, Vaclav Kremen, Matias I Maturana, Vaclav Gerla, Petr Nejedly, Gregory A Worrell, Lhotska Lenka, Filip Mivalt, Raymond C Boston and 7 more

Open access · goldAbstract read
In one paragraph

Article in EClinicalMedicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
6.6field-weighted citation impact, top 2% 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

34 citing papers in PubMed, 61 citations in OpenAlex.

  1. Trial
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  3. Post-Ictal Sleep Changes in Human Focal Epilepsy.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2026
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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

17 authors at 3 institutions in 3 countries.

Katrina L DellDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
Daniel E PayneDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
Vaclav KremenDepartment of Neurology, Mayo Clinic, Rochester, United States.
Matias I MaturanaDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
Vaclav GerlaCzech Institute of Informatics, Robotics, and Cybernetics, Czech Technical University in Prague, Prague, Czech Republic.
Petr NejedlyDepartment of Neurology, Mayo Clinic, Rochester, United States.
Gregory A WorrellDepartment of Neurology, Mayo Clinic, Rochester, United States.
Lhotska LenkaCzech Institute of Informatics, Robotics, and Cybernetics, Czech Technical University in Prague, Prague, Czech Republic.
Filip MivaltDepartment of Neurology, Mayo Clinic, Rochester, United States.
Raymond C BostonDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
Benjamin H BrinkmannDepartment of Neurology, Mayo Clinic, Rochester, United States.
Wendyl D'SouzaDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
Anthony N BurkittDepartment of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, Australia.
David B GraydenDepartment of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, Australia.
Levin KuhlmannDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
Dean R FreestoneSeer Medical, Melbourne, Victoria, Australia.
Mark J CookDepartment of Medicine, St. Vincent's Hospital, University of Melbourne, Level 4, 29 Regent Street, Fitzroy, Victoria 3065, Australia.
The University of Melbourne · AUMayo Clinic · USCzech Technical University in Prague · CZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWhile the effects of prolonged sleep deprivation (≥24 h) on seizure occurrence has been thoroughly explored, little is known about the effects of day-to-day variations in the duration and quality of sleep on seizure probability. A better understanding of the interaction between sleep and seizures may help to improve seizure management.

methodsTo explore how sleep and epileptic seizures are associated, we analysed continuous intracranial electroencephalography (EEG) recordings collected from 10 patients with refractory focal epilepsy undergoing ordinary life activities between 2010 and 2012 from three clinical centres (Austin Health, The Royal Melbourne Hospital, and St Vincent's Hospital of the Melbourne University Epilepsy Group). A total of 4340 days of sleep-wake data were analysed (average 434 days per patient). EEG data were sleep scored using a semi-automated machine learning approach into wake, stages one, two, and three non-rapid eye movement sleep, and rapid eye movement sleep categories.

findingsSeizure probability changes with day-to-day variations in sleep duration. Logistic regression models revealed that an increase in sleep duration, by 1·66 ± 0·52 h, lowered the odds of seizure by 27% in the following 48 h. Following a seizure, patients slept for longer durations and if a seizure occurred during sleep, then sleep quality was also reduced with increased time spent aroused from sleep and reduced rapid eye movement sleep.

interpretationOur results suggest that day-to-day deviations from regular sleep duration correlates with changes in seizure probability. Sleeping longer, by 1·66 ± 0·52 h, may offer protective effects for patients with refractory focal epilepsy, reducing seizure risk. Furthermore, the occurrence of a seizure may disrupt sleep patterns by elongating sleep and, if the seizure occurs during sleep, reducing its quality.

Indexed as

ConvulsionsEEGElectroencephalographyEpilepsyLong-termNon-rapid eye movementRapid eye movementSeizuresSleepSleep architectureSleep compositionSleep durationSleep quality

Identifiers

PMID34386736
PMCPMC8343264
OpenAlexW3167155731

What OpenQuestion holds

Textmetadata
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.