Evidence map›Paper›PMID 33342004›Full record

ArticleEuropean journal of neurology2021

The APOE ε4 allele in relation to pre- and postsurgical cognitive functioning of patients with primary brain tumors.

Elke Butterbrod, Margriet Sitskoorn, Marjan Bakker, Bernadette Jakobs, Ruth Fleischeuer, Janine Roijers, Geert-Jan Rutten, Karin Gehring

Open access · hybridAbstract read
In one paragraph

Article in European journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 2 pooled it
0.6field-weighted citation impact, top 26% 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

10 citing papers in PubMed, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

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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

8 authors at 2 institutions in 1 country.

Elke ButterbrodDepartment of Cognitive Neuropsychology, Tilburg University, Tilburg, The Netherlands.ORCID 0000-0002-7181-1455
Margriet SitskoornDepartment of Cognitive Neuropsychology, Tilburg University, Tilburg, The Netherlands.
Marjan BakkerDepartment of Methodology and Statistics, Tilburg University, Tilburg, The Netherlands.
Bernadette JakobsDepartment of Laboratory Medicine, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands.
Ruth FleischeuerClinical Pathology Laboratory, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands.
Janine RoijersDepartment of Laboratory Medicine, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands.
Geert-Jan RuttenDepartment of Neurosurgery, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands.
Karin GehringDepartment of Cognitive Neuropsychology, Tilburg University, Tilburg, The Netherlands.
Elisabeth-TweeSteden Ziekenhuis · NLTilburg University · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRecent studies suggest a relationship between the APOE ε4 allele and cognitive outcome in patients treated for malignant brain tumors. Still, longitudinal investigations that include a pretreatment cognitive assessment are lacking and APOE's effects in patients with benign tumors are understudied. This study investigated presurgical cognitive performance and postsurgical change in ε4-carrying and non-carrying patients with glioma and meningioma.

methodsNeuropsychological test scores (CNS Vital Signs battery [seven measures], Digit Span Forward/Backward, Letter Fluency test) were obtained as part of a prospective study in which patients with meningioma and glioma underwent cognitive assessment 1 day before (T0, n = 505) and 3 (T3, n = 418) and 12 months after (T12, n = 167) surgery. APOE isoforms were identified retrospectively. ε4 carriers and non-carriers were compared with regard to pretreatment cognitive performance on the group and individual level. Changes in performances over time were compared with longitudinal mixed model analysis in the total sample and the subgroup receiving adjuvant treatment.

resultsCarriers and non-carriers did not differ with regard to pretreatment performance. No significant main effect of ε4 carrier status or interaction between time (T0-T12) and carrier status was found on any of the tests in the whole sample nor in the sample receiving adjuvant treatment.

conclusionsThis study found no evidence of increased vulnerability for pretreatment cognitive dysfunction or cognitive decline within 1 year after surgery in APOE ε4-carrying meningioma and glioma patients. Investigations that include larger samples at longer-term follow-up are recommended to investigate potential late treatment effects.

Indexed as

Apolipoprotein E4Brain NeoplasmsAllelesCognitionGenotypeHumansNeuropsychological TestsProspective StudiesRetrospective StudiesApolipoprotein E4APOE ε4brain tumorcognitive functioninggliomameningioma

Identifiers

PMID33342004
PMCPMC8247965
OpenAlexW3114734685

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.