Evidence map›Paper›PMID 30768376›Full record

ArticleSports health

Head Trauma Exposure in Mixed Martial Arts Varies According to Sex and Weight Class.

Bruno Follmer, Rodolfo Andre Dellagrana, E Paul Zehr

Open access · bronzeAbstract read
In one paragraph

Article in Sports health. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
3.4field-weighted citation impact, top 8% of its field
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

14 citing papers in PubMed, 39 citations in OpenAlex.

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  13. Upper Limb Strikes Reactive Forces in Mix Martial Art Athletes during Ground and Pound Tactics.International journal of environmental research and public health · 2020
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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

3 authors at 3 institutions in 2 countries.

Bruno FollmerBiomechanics Laboratory, Center of Sports, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
Rodolfo Andre DellagranaBiomechanics Laboratory, Center of Sports, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
E Paul ZehrSchool of Exercise Science, Physical, and Health Education, University of Victoria, Victoria, British Columbia, Canada.
International Collaboration On Repair Discoveries · CAUniversidade Federal de Mato Grosso do Sul · BRUniversity of Victoria · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBrain injury arising from head trauma is a major concern in mixed martial arts (MMA) because knockout (KO) and technical knockout (TKO) are frequent fight outcomes. Previous studies have shown a high incidence of matches ending due to strikes to the head but did not consider weight categories and female fights. This study aimed at analyzing match stoppages in MMA and the exposure to head trauma distinguished by sex and weight categories. HYPOTHESIS: The heavier the weight class, the greater the risk and incidence of head trauma will be, regardless of sex. STUDY

designDescriptive epidemiology study. LEVEL OF EVIDENCE: Level 3.

methodsPublicly available data of 167 MMA events from 1903 fights between 2014 and 2017 were assessed, comprising 8 male and 2 female weight categories.

resultsThe combined KO/TKO rates per 100 athlete-exposures in the middleweight (19.53), light heavyweight (20.8), and heavyweight (26.09) divisions were greater than previously reported for MMA. While stoppage via KO/TKO occurred in 7.9% of combats in the female strawweight division, it occurred in 52.1% of the male heavyweight fights. The male middleweight ( P = 0.001), light heavyweight ( P < 0.001), and heavyweight divisions ( P < 0.001) had an increased risk of KO/TKO due to strikes to the head by 80%, 100%, and 206%, respectively. The risk in the flyweight division decreased 62% ( P = 0.001). All categories were compared with the lightweight division. The female bantamweight category presented a 221% increased risk in matches ending due to KO/TKO compared with the strawweight division ( P = 0.012). Punches to the head were the major technique used to end a combat via KO/TKO, regardless of sex and weight class.

conclusionHead injury risk and incidence varies considerably according to sex and weight category in MMA. CLINICAL RELEVANCE: The analysis of head trauma exposure in MMA athletes should be distinguished according to sex and weight category.

Indexed as

Body WeightSex FactorsAthletesCraniocerebral TraumaFemaleHumansIncidenceMaleMartial Artsbrain concussionchronic traumatic encephalopathycombat sportshead injuriestraumatic brain injury

Identifiers

PMID30768376
PMCPMC6537320
OpenAlexW2914768865

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.