Evidence map›Paper›PMID 40165216›Full record

ArticleBMC sports science, medicine & rehabilitation2025

The influence of the video assistant referee on the UEFA European Championship.

Rui Bao, Miguel Ángel Gómez Ruano, Ruixia Shi, Xinpu Wang, Bo Han

Abstract read
In one paragraph

Article in BMC sports science, medicine & rehabilitation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–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

1 citing paper in PubMed.

  1. 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

5 authors.

Rui BaoCollege of Physical Education and Health, East China Normal University, Shanghai, China. rb816125@163.com.ORCID http://orcid.org/0009-0003-9121-4556
Miguel Ángel Gómez RuanoFacultad de Ciencias de la Actividad Física y del Deporte, Universidad Politécnica de Madrid, Madrid, Spain.
Ruixia ShiFaculty of Arts and Sciences, Beijing Normal University at Zhuhai, Zhuhai, China.
Xinpu WangSchool of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.
Bo HanChina Football College, Beijing Sport University, Beijing, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundVideo Assistant Referee (VAR) as a high-tech aid was introduced into football in 2018 to enhance the officiating accuracy of referees. At the 2020 UEFA European Championship, VAR was used for the first time. This study aims to investigate the impact of VAR on the UEFA European Championship.

methodsThe sample includes all matches of EURO 2016 (without VAR, n = 51) and EURO 2020 (with VAR, n = 51), in a total of 102 matches. For each game, nine VAR-related variables were recorded: goals, penalties, red cards, yellow cards, fouls, offsides, first-half game time, second-half game time and total game time. The tournaments pre and post the introduction of VAR were compared using a Mann-Whitney U test.

resultsThe results of this study revealed that the introduction of VAR led to a significant increase in the first-half match time (Z = 2.52, p = 0.012, ES = 0.13), the second-half match time (Z = 2.80, p = 0.005, ES = 0.16), total game time (Z = 3.74, p < 0.001, ES = 0.28) and the number of goals (Z = 2.25, p = 0.024, ES = 0.10), whereas a significant decrease in yellow cards (Z=-2.55, p = 0.011, ES = 0.13) was observed.

conclusionsThe findings of this study may have practical implications for optimizing VAR-related implementation regulations and the referee's officiating strategies at the UEFA European Championship competitions.

Indexed as

Decision-makingFootballPerformance analysisRefereeVideo assistant referee

Identifiers

PMID40165216
PMCPMC11956465

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.