Evidence map›Paper›PMID 35192702›Full record

ArticleJournal of athletic training2022

Avenues for Sport-Related Concussion Prevention in High School Football: Effect of Limiting Collision Practices.

Abigail C Bretzin, Christopher P Tomczyk, Douglas J Wiebe, Tracey Covassin

Abstract read
In one paragraph

Article in Journal of athletic training, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 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

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Sport-Related Concussions in High School Athletes: A Comprehensive Update.Current neurology and neuroscience reports · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. The National Football League Concussion Protocol: A Review.HSS journal : the musculoskeletal journal of Hospital for Special Surgery · 2023
    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

4 authors.

Abigail C BretzinPenn Injury Science Center, Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia.
Christopher P TomczykDepartment of Kinesiology, Michigan State University, East Lansing.
Douglas J WiebePenn Injury Science Center, Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia.
Tracey CovassinDepartment of Kinesiology, Michigan State University, East Lansing.

Funding

TRAINING PROGRAM/RESPIRATORY NEUROBIOLOGY AND SLEEPT32HL007713 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI PACK, ALLAN I · 1992 to 2022
$11.9M
NHLBI NIH HHS T32 HL007713
6 · The paper itself

Abstract

contextFootball continues to demonstrate the highest rate of sport-related concussion (SRC) in high school athletics. To mitigate the SRC risk, the Michigan High School Athletic Association (MHSAA) implemented rules aimed at reducing the number of collisions occurring in practices.

objectiveTo estimate the rates of SRC in MHSAA football programs and evaluate progressive limitations to collision practices over 5 consecutive seasons.

designRetrospective cohort study.

settingMichigan high school football. PATIENTS OR OTHER

participantsHigh school (9th-12th grade) football athletes (>99% male) participating in MHSAA-sanctioned events. MAIN OUTCOME MEASURE(S): Designated administrators at each school recorded the total number of participating athletes and SRCs (defined as head injuries resulting from athletic participation that required the student-athletes to be withheld from activity after exhibiting signs, symptoms, or behaviors consistent with an SRC) in the MHSAA injury-surveillance system each season (2015-2016 through 2019-2020). Progressive limitations to collision practices occurred across the study period. We estimated athlete-exposures (AEs) as the total number of players multiplied by the total number of possible practices (11 weeks, 4 days each) or competitions (9 weeks, 1 day each) during each season. Incidence rates and rate ratios (RRs) with 95% CIs were used to compare practice and competition SRCs and each season with the most recent season.

resultsA total of 7755 football SRCs were diagnosed across the 5-year period. The overall SRC rate was 8.03 per 10 000 AEs (95% CI = 7.85, 8.21). The competition SRC rate (30.13/10 000 AEs) was higher than the practice rate (3.51/10 000 AEs; RR = 8.58; 95% CI = 8.19, 9.00). The practice SRC rate was lower in 2017-2018 (RR = 0.86; 95% CI = 0.77, 0.97), 2018-2019 (RR = 0.89; 95% CI = 0.79, 1.0), and 2019-2020 (RR = 0.83; 95% CI = 0.74, 0.94) relative to 2015-2016.

conclusionsWe found that the progressive limitations to collision practices were protective against SRCs, as the rate of SRC was lower in the 3 most recent seasons relative to 2015-2016.

Indexed as

Athletic InjuriesBrain ConcussionFootballAthletesFemaleHumansIncidenceMaleRetrospective StudiesSchoolsUniversitiesAmerican footballepidemiologyinjury preventionpolicies

Identifiers

PMID35192702
PMCPMC9661931

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.