Evidence map›Paper›PMID 33312682›Full record

ArticleBMJ open sport & exercise medicine2020

Neurocognitive performance and mental health of retired female football players compared to non-contact sport athletes.

Annika Prien, Nina Feddermann-Demont, Evert Verhagen, Jos Twisk, Astrid Junge

Open access · goldAbstract read
In one paragraph

Article in BMJ open sport & exercise medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
1.0field-weighted citation impact, top 22% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 23 citations in OpenAlex.

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  9. Medicina (Kaunas, Lithuania) · 2025
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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

5 authors at 4 institutions in 4 countries.

Annika PrienFakultät Humanwissenschaften, MSH Medical School Hamburg, Hamburg, Germany.ORCID 0000-0001-7792-2044
Nina Feddermann-DemontDepartment of Neurology, University Hospital Zurich, Zurich, Switzerland.ORCID 0000-0002-9632-0601
Evert VerhagenAmsterdam Collaboration on Health & Safety in Sports, Public and Occupational Health, Amsterdam UMC Locatie VUmc, Amsterdam, The Netherlands.ORCID 0000-0001-9227-8234
Jos TwiskEpidemiology and Biostatistics, Amsterdam UMC Locatie VUmc, Amsterdam, The Netherlands.
Astrid JungeFakultät Humanwissenschaften, MSH Medical School Hamburg, Hamburg, Germany.ORCID 0000-0002-6815-9793
MSH Medical School Hamburg – University of Applied Sciences and Medical University · DEAmsterdam UMC Location Vrije Universiteit Amsterdam · NLUniversity Hospital of Zurich · CHUniversity of Cape Town · ZA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdverse long-term effects of playing football due to repetitive head impact exposure on neurocognition and mental health are controversial. To date, no studies have evaluated such effects in women.

aimsTo (1) compare neurocognitive performance, cognitive symptoms and mental health in retired elite female football players (FB) with retired elite female non-contact sport athletes (CON), and to (2) assess whether findings are related to history of concussion and/or heading exposure in FB.

methodsNeurocognitive performance, mental health and cognitive symptoms were assessed using computerised tests (CNS-vital signs), paper pen tests (Category fluency, Trail-Making Test, Digit Span, Paced Auditory Serial Addition Test), questionnaires (Hospital Anxiety and Depression Scale, SF-36v2 Health Survey) and a symptom checklist. Heading exposure and concussion history were self-reported in an online survey and in a clinical interview, respectively. Linear regression was used to analyse the effect of football, concussion and heading exposure on outcomes adjusted for confounders.

resultsFB (n=66) performed similar to CON (n=45) on neurocognitive tests, except for significantly lower scores on verbal memory (mean difference (MD)=-7.038, 95% CI -12.98 to -0.08, p=0.038) and verbal fluency tests (MD=-7.534, 95% CI -13.75 to -0.46, p=0.016). Among FB weaker verbal fluency performance was significantly associated with ≥2 concussions (MD=-10.36, 95% CI -18.48 to -2.83, p=0.017), and weaker verbal memory performance with frequent heading (MD=-9.166, 95% CI -17.59 to -0.123, p=0.041). The depression score differed significantly between study populations, and was significantly associated with frequent heading but not with history of concussion in FB.

conclusionFurther studies should investigate the clinical relevance of our findings and whether the observed associations point to a causal link between repetitive head impacts and verbal memory/fluency or mental health.

Indexed as

concussionfemalesoccer

Identifiers

PMID33312682
PMCPMC7716672
OpenAlexW3108330253

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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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.