Head Impact Agreement on Video Review Differs Across Rater Experience in High School Football.
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2023
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Context: Previous studies have used multiple raters for video-based reviews as a means for quantifying head impacts. However, few studies have reported on the rater's experience level and the potential influence it may have on the reliability of such video-verification methods. Objective: The purpose of this study was to assess level of agreement between two categories of raters for a video verification method of head impacts during football games. Setting: Two high school varsity football games. Participants: Eight defensive players. Main outcome measures: The definition for a video-observed head impact an obvious helmet-to-helmet, helmet-to-body, or helmet-to-playing surface impact. The video scoring consisted of four trained research personnel who reviewed a single, previously recorded game from two camera views (50-yard line and endzone). Raters participated in standardized training using separate video footage to agree on an observed head impact and to familiarize themselves with the video verification process. Two raters were certified athletic trainers with high school and college football athletic training experience and remaining two were undergraduate students without football-specific experience. No rater had any previous video analysis experience. The data were reduced by averaging the frequency count of each group and converted to 0= no head impact observed, 1= head impact observed. SPSS statistical software was used to calculate Pearson’s chi-square analyses to examine the differences in head impacts observed between the two categories of raters. Results: The chi square analysis for the first game was x2 (1) = 14.5, p <0.001 and for the second game it was x2 (1) = 23.7, p <0.001. Conclusion: The results suggest the importance of defining rater’s experience for any possible effect in accurately reporting head impacts on video analysis. Future research is needed to analyze inter-rater agreement of head impacts and comparing to head sensor data when available. The current study is important to establish research methods for video verification needed in order to understand the relationship between head impacts and risks of sport-related concussions. Word count: 341
Key words: video verification, raters, head impacts
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Kinesiology
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23 pages
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