TitleValidation of HeadCount-2w for estimation of two-week heading: Comparison to daily reporting in adult amateur player.
Publication TypeJournal Article
Year of Publication2018
AuthorsLipton, ML, Ifrah, C, Stewart, WF, Fleysher, R, Sliwinski, MJ, Kim, M, Lipton, RB
JournalJ Sci Med Sport
Date Published2018 Apr
KeywordsAdolescent, Adult, Athletes, Craniocerebral Trauma, Female, Head, Humans, Male, Middle Aged, Prospective Studies, Self Report, Soccer, Surveys and Questionnaires, Young Adult

<p><b>OBJECTIVES: </b>To validate the HeadCount-2w questionnaire for estimation of 2-week soccer heading by comparison to daily electronic diary reporting over the same two-week period.</p><p><b>DESIGN: </b>Prospective observational study.</p><p><b>METHODS: </b>Adult amateur soccer players completed HeadCount-daily, comprising 14 daily at-home assessments of soccer play and heading via a tablet PC. Following the 14day period, players completed HeadCount-2w, a web-based two-week-recall questionnaire on soccer and heading. intraclass correlation coefficient (ICC) was estimated between HeadCount-daily, the reference standard, and HeadCount-2w estimates of heading during the same 2-week period.</p><p><b>RESULTS: </b>53 participants (38 men) reported a mean of 24.36 (median=11.76) headers during 2 weeks via HeadCount-daily and a mean of 38.34 (median=15.0) headers for the same 2 weeks via HeadCount-2w. The ICC comparing 2-week heading from HeadCount-daily and HeadCount-2w was 0.85. Linear regression of the log-transformed Headcount-daily on HeadCount-2w data yielded a slope of 0.71 (p<0.001; 95% CI 0.54-0.82), suggesting that heading tends to be over-estimated by HeadCount-2w relative to HeadCount-daily. Slope estimates for men (0.65) and women (0.71) were similar.</p><p><b>CONCLUSIONS: </b>HeadCount, a self-administered web-based survey, is valid for self-reporting 2-week heading in adult amateur players, supporting its use in future research and as a simple and low-cost technique for exposure monitoring.</p>

Alternate JournalJ Sci Med Sport
PubMed ID28882435
PubMed Central IDPMC5826783
Grant ListR01 NS082432 / NS / NINDS NIH HHS / United States
UL1 TR001073 / TR / NCATS NIH HHS / United States