Evidence map›Paper›PMID 35632390›Full record

ArticleVaccines2022

COVID-19 Infection among Elite Football Players: A Nationwide Prospective Cohort Study.

Dimitrios Papagiannis, Theodoros Laios, Konstantinos Tryposkiadis, Konstantinos Kouriotis, Xenophon Roussis, Georgios Basdekis, Panagiotis Boudouris, Christos Cholevas, Stergios Karakitsios, Pindaros Kakavas and 14 more

Abstract read
In one paragraph

Article in Vaccines, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed.

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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

24 authors.

Dimitrios PapagiannisPublic Health & Vaccines Lab, Department of Nursing, School of Health Sciences, University of Thessaly Larissa, 411 10 Larissa, Greece.ORCID 0000-0001-6123-559X
Theodoros LaiosSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Konstantinos TryposkiadisInstitute of Applied Health Research, University of Birmingham, Birmingham B15 2TT, UK.
Konstantinos KouriotisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Xenophon RoussisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Georgios BasdekisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Panagiotis BoudourisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Christos CholevasSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Stergios KarakitsiosSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Pindaros KakavasSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Theoharis KiriakidisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Panagiotis KouloumentasSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Georgios KouvidisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Grigoris ManoudisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Pantelis NikolaouSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Christos TheosSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Andreas-Nikolaos PiskopakisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Ioannis RallisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Stavros RistanisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.ORCID 0000-0002-6592-0348
Alexandros ToliopoulosSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.ORCID 0000-0003-3918-9747
Grigoris ZisisSuper League Greece Mesogeion 174, 151 25 Maroussi, Greece.
Yiannis TheodorakisDepartment of Physical Education and Sport Sciences, University of Thessaly, 382 21 Volos, Greece.
Konstantinos I GourgoulianisDepartment of Respiratory Medicine, School of Health Sciences, University of Thessaly, 411 10 Larissa, Greece.
Georgios RachiotisDepartment of Hygiene and Epidemiology, School of Health Sciences, Faculty of Medicine, University of Thessaly, 411 10 Larissa, Greece.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Little is known about the risk of COVID-19 infection among footballers. We aimed to investigate the incidence and characteristics of COVID-19 infection among footballers. In total, 480 football players of Super League Greece and 420 staff members participated in a prospective cohort study, which took place from May 2020 to May 2021. Nasopharyngeal swabs were collected from footballers and staff members weekly. All samples (n = 43,975) collected were tested using the reverse transcriptase polymerase chain reaction (RT-PCR) test for the detection of “SARS-CoV-2”. In total, 190 positive cases (130 among professional football players and 60 among staff) were recorded. Out of the 190 cases that turned positive, 64 (34%) cases were considered as symptomatic, and 126 (66%) cases were asymptomatic. The incidence rate of a positive test result for footballers was 0.57% (confidence interval (CI) 0.48−0.68%) and for staff members it was 0.27% (CI 0.20%, 0.34%), respectively. Footballers recorded a twofold increased risk of COVID-19 infection in comparison to staff members (relative risk = 2.16; 95% CI = 1.59−2.93; p-value < 0.001). No significant transmission events were observed during the follow-up period. We found a low incidence of COVID-19 infection among professional footballers over a long follow-up period. Furthermore, the implementation of a weekly diagnostic testing (RT-PCR) was critical to break the transmission chain of COVID-19, especially among asymptomatic football players and staff members.

Indexed as

COVID-19incidenceprofessional footballersrelative risktransmission

Identifiers

PMID35632390
PMCPMC9144666

What OpenQuestion holds

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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.