Evidence map›Paper›PMID 33403431›Full record

ArticleActa neurochirurgica2021

Impact of the weekend effect on outcome after microsurgical clipping of ruptured intracranial aneurysms.

Lukas Goertz, Christoph Kabbasch, Muriel Pflaeging, Lenhard Pennig, Kai Roman Laukamp, Marco Timmer, Hanna Styczen, Gerrit Brinker, Roland Goldbrunner, Boris Krischek

Abstract read

PubMed Full text at PMC Publisher

In one paragraph

Article in Acta neurochirurgica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it

0cells of the map it votes in

7citing papers in PubMed, 1 pooled it

–field-weighted citation impact

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

7 citing papers in PubMed, 1 synthesis or guideline pooled it.

Association of Off-Hour Admission With Treatment Delay and Unfavorable Outcomes in Patients With Stroke: A Systematic Review and Meta-Analysis.Journal of the American Heart Association · 2026
Pooled it
The weekend effect in pelvic fractures and influence of weekday and weekend accident days: a retrospective study of the German Pelvic Registry.Scientific reports · 2025
Article
Multidimensional outcome after endovascular or microsurgical occlusion of ruptured intracranial aneurysms - Comparative analysis of a prospective Swiss multicenter study.Brain & spine · 2025
Article
Acute evacuation of 54 intracerebral hematomas (aICH) during the microsurgical clipping of a ruptured middle cerebral artery bifurcation aneurysm-illustration of the individual clinical courses and outcomes with a serial brain CT/MRI panel until 12 months.Acta neurochirurgica · 2024
Review
Weekend Admission and Mortality in Patients With Traumatic Brain Injury: A Meta-analysis.Korean journal of neurotrauma · 2023
Review
Should individual timeline and serial CT/MRI panels of all patients be presented in acute brain insult cohorts? A pilot study of 45 patients with decompressive craniectomy after aneurysmal subarachnoid hemorrhage.Acta neurochirurgica · 2023
Review
The weekend effect in aneurysmal subarachnoid haemorrhage: a single centre experience and review.Neurosurgical review · 2023
Article

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

10 authors.

Lukas GoertzCenter for Neurosurgery, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany. lukas.goertz@uk-koeln.de.ORCID http://orcid.org/0000-0002-2620-7611

Christoph KabbaschDepartment of Neuroradiology, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Muriel PflaegingCenter for Neurosurgery, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Lenhard PennigDepartment of Neuroradiology, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Kai Roman LaukampDepartment of Neuroradiology, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Marco TimmerCenter for Neurosurgery, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Hanna StyczenInstitute for Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany.

Gerrit BrinkerCenter for Neurosurgery, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Roland GoldbrunnerCenter for Neurosurgery, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Boris KrischekCenter for Neurosurgery, Medical Faculty and University Hospital, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe "weekend effect" describes the assumption that weekend and/or on-call duty admission of emergency patients is associated with increased morbidity and mortality rates. For aneurysmal subarachnoid hemorrhage, we investigated, whether presentation out of regular working hours and microsurgical clipping at nighttime correlates with worse patient outcome.

methodsThis is a retrospective review of consecutive patients that underwent microsurgical clipping of an acutely ruptured aneurysm at our institution between 2010 and 2019. Patients admitted during (1) regular working hours (Monday-Friday, 08:00-17:59) and (2) on-call duty and microsurgical clipping performed during (a) daytime (Monday-Sunday, 08:00-17:59) and (b) nighttime were compared regarding the following outcome parameters: operation time, treatment-related complications, vasospasm, functional outcome, and angiographic results.

resultsAmong 157 enrolled patients, 104 patients (66.2%) were admitted during on-call duty and 48 operations (30.6%) were performed at nighttime. Admission out of regular hours did not affect cerebral infarction (p = 0.545), mortality (p = 0.343), functional outcome (p = 0.178), and aneurysm occlusion (p = 0.689). Microsurgical clipping at nighttime carried higher odds of unfavorable outcome at discharge (OR: 2.3, 95%CI: 1.0-5.1, p = 0.039); however, there were no significant differences regarding the remaining outcome parameters. After multivariable adjustment, clipping at nighttime did not remain as independent prognosticator of short-term outcome (OR: 2.1, 95%CI: 0.7-6.2, p = 0.169).

conclusionsAdmission out of regular working hours and clipping at nighttime were not independently associated with poor outcome. The adherence to standardized treatment protocols might mitigate the "weekend effect."

Indexed as

After-Hours CareMicrosurgeryNight CareAgedAneurysm, RupturedAngiographyCerebral InfarctionEndovascular ProceduresFemaleHumansIntracranial AneurysmMaleMiddle AgedNeurosurgical ProceduresPatient AdmissionRetrospective StudiesAngiographic outcomeCerebral infarctionClippingFunctional outcomeModified Rankin scaleNight

Identifiers

PMID33403431

DOI10.1007/s00701-020-04689-9

PMCPMC7886827

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LicenceCC BY

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Registered trials

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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.