Evidence map›Paper›PMID 37837553›Full record

ArticleSports medicine - open2023

Risk Factors for Concussion in Under 18, Under 22 and Professional Men's Rugby Union: A Video Analysis of 14,809 Tackles.

Takayuki Kawasaki, Yuta Kawakami, Shuko Nojiri, Yoshinori Hasegawa, Manabu Kuroki, Shogo Sobue, Kenta Shibuya, Yuji Takazawa, Muneaki Ishijima

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In one paragraph

Article in Sports medicine - open, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 2 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

5 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
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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.

Takayuki KawasakiDepartment of Orthopaedics Surgery, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo, Tokyo, 113-8421, Japan. k-saki@luck.ocn.ne.jp.ORCID http://orcid.org/0000-0003-3306-8506
Yuta KawakamiDepartment of Mathematics, Physics, Electrical Engineering and Computer Science, Graduate School of Engineering Science, Yokohama National University, Kanagawa, Japan.
Shuko NojiriDepartment of Medical Technology Innovation Center, Juntendo University, Tokyo, Japan.
Yoshinori HasegawaDepartment of Orthopaedics Surgery, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo, Tokyo, 113-8421, Japan.
Manabu KurokiDivision of Intelligent Systems Engineering, Faculty of Engineering, Yokohama National University, Kanagawa, Japan.
Shogo SobueDepartment of Orthopaedics Surgery, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo, Tokyo, 113-8421, Japan.
Kenta ShibuyaDepartment of Orthopaedics Surgery, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo, Tokyo, 113-8421, Japan.
Yuji TakazawaDepartment of Orthopaedics Surgery, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo, Tokyo, 113-8421, Japan.
Muneaki IshijimaDepartment of Orthopaedics Surgery, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo, Tokyo, 113-8421, Japan.

Funding

Japan Society for the Promotion of Science KAKENHI No. 19K11498
6 · The paper itself

Abstract

objectiveThis study aimed to identify the risk factors for tackle-related concussion observed in matches involving under (U) 18, U 22 and professional men's Rugby Union players through video analysis. STUDY

designDescriptive epidemiology study.

methodsTwenty Rugby Union matches each for high school (U18), university/college (U22) and professional (Elite) were randomly selected from 202 matches in the 2018/2019 season. Both one-on-one and tackles involving multiple tacklers were analyzed for the 60 matches. The 28 categorical and continuous variables (e.g., tackle characteristics and duration before the tackle) were applied as risk factors to a least absolute shrinkage and selection operator (Lasso) regression analysis. To identify high-risk situations, a simulation model with coefficients obtained from the Lasso regression was used. Statistical analysis was conducted according to tackle direction.

resultsA total of 14,809 tackles and 41 concussions involving 1800 players were included in the analyses. The incidence rate of concussions (injuries/1000 tackles) was greater in Elite players (4.0) compared with U18 (1.9) and U22 (2.4) players. The factors most highly associated with concussions were head-in-front tackles (where the tackler's head is placed forward, impeding a ball carrier's forward movements, 11.26/1000 tackles), and were more often observed among U18 players. A simulation model predicted that the highest risk tackle situation in Elite players was a head-in-front, side-on tackle below the hip of the ball carrier (predicted incidence rate 18.07/1000 tackles).

conclusionThe risk factors associated with concussion need to be assessed cautiously. Avoiding head-in-front, side-on tackles to the lower extremities of a ball carrier should be considered to reduce injury risks.

Indexed as

ConcussionRugbyTackleVideo analysis

Identifiers

PMID37837553
PMCPMC10576729

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LicenceCC BY
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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.