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Clin J Sport Med. 2014 Sep;24(5):397-402. doi: 10.1097/JSM.0000000000000047.

Interrater agreement of an observational tool to code knockouts and technical knockouts in mixed martial arts.

Author information

  • 1*Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; †David L. MacIntosh Sport Medicine Clinic, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada; ‡Division of Neurosurgery, Injury Prevention Research Office, Keenan Research Centre, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; and §University of Toronto, Toronto, Ontario, Canada.

Abstract

OBJECTIVE:

Interrater agreement evaluation of a tool to document and code the situational factors and mechanisms of knockouts (KOs) and technical knockouts (TKOs) in mixed martial arts (MMA).

DESIGN:

Retrospective case series.

SETTING:

Professional MMA matches from the Ultimate Fighting Championship-2006-2012.

PARTICIPANTS:

Two nonmedically trained independent raters.

MAIN OUTCOME MEASURES:

The MMA Knockout Tool (MMA-KT) consists of 20 factors and captures and codes information on match characteristics, situational context preceding KOs and TKOs, as well as describing competitor states during these outcomes. The MMA-KT also evaluates the mechanism of action and subsequent events surrounding a KO.

RESULTS:

The 2 raters coded 125 unique events for a total of 250 events. The 8 factors of Part A had an average κ of 0.87 (SD = 0.10; range = 0.65-0.98); 7 were considered "substantial" agreement and 1 "moderate." Part B consists of 12 factors with an average κ of 0.84 (SD = 0.16; range = 0.59-1.0); 7 classified as "substantial" agreement, 4 "moderate," and 1 "fair." The majority of the factors in the MMA-KT demonstrated substantial interrater agreement, with an average κ of 0.86 (SD = 0.13; range = 0.59-1.0).

CONCLUSIONS:

The MMA-KT is a reliable tool to extract and code relevant information to investigate the situational factors and mechanism of KOs and TKOs in MMA competitions.

PMID:
24378405
[PubMed - in process]
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