Evidence map›Paper›PMID 17496068›Full record

ArticleBritish journal of sports medicine2007

No neurochemical evidence for brain injury caused by heading in soccer.

Henrik Zetterberg, Michael Jonsson, Abdullah Rasulzada, Cornel Popa, Ewa Styrud, Max Albert Hietala, Lars Rosengren, Anders Wallin, Kaj Blennow

Abstract read
In one paragraph

Article in British journal of sports medicine, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 3 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

21 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Potential Blood-based Biomarkers for Concussion.Sports medicine and arthroscopy review · 2016
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  8. Serum neurofilament light in professional soccer players: goal on safety.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
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  14. Observational
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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

9 authors.

Henrik ZetterbergInstitute of Neuroscience and Physiology, Department of Neurochemistry and Psychiatry, the Sahlgrenska Academy at Göteborg University, Göteborg, Sweden. henrik.zetterberg@clinchem.gu.se
Michael Jonsson
Abdullah Rasulzada
Cornel Popa
Ewa Styrud
Max Albert Hietala
Lars Rosengren
Anders Wallin
Kaj Blennow

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe possible injurious effect to the brain of heading in soccer is a matter of discussion.

objectiveTo determine whether standardised headings in soccer are associated with increased levels of biochemical markers for neuronal injury in cerebrospinal fluid (CSF) and serum.

methods23 male amateur soccer players took part in a heading training session involving heading a ball kicked from a distance of 30 m at least 10 m forward. Ten players performed 10 and 13 players performed 20 approved headings. The players underwent lumbar puncture and serum sampling 7-10 days after the headings. The study also included 10 healthy male non-athletic control subjects. CSF was analysed for neurofilament light protein, total tau, glial fibrillary acidic protein, S-100B and albumin concentrations. Serum was analysed for S-100B and albumin.

resultsNone of the biomarker levels were abnormal and there were no significant differences between any of the three groups, except for a slightly increased CSF S-100B concentration in controls compared with headers. Biomarker levels did not correlate with the number of headings performed.

conclusionRepeated low-severity head impacts due to heading in soccer are not associated with any neurochemical signs of injury to the brain.

Indexed as

AdultBiomarkersBrain InjuriesCase-Control StudiesEnzyme-Linked Immunosorbent AssayGlial Fibrillary Acidic ProteinHumansInjury Severity ScoreMaleS100 ProteinsSerum AlbuminSoccertau ProteinsTumor Necrosis Factor Ligand Superfamily Member 14BiomarkersGlial Fibrillary Acidic ProteinS100 ProteinsSerum Albumintau ProteinsTumor Necrosis Factor Ligand Superfamily Member 14

Identifiers

PMID17496068
PMCPMC2465404

What OpenQuestion holds

Textmetadata
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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.