{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T10:33:27Z","timestamp":1777804407257,"version":"3.51.4"},"reference-count":26,"publisher":"SAGE Publications","issue":"9","license":[{"start":{"date-parts":[[2021,4,9]],"date-time":"2021-04-09T00:00:00Z","timestamp":1617926400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"Riddell"},{"name":"ElMindA"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Child Neurol"],"published-print":{"date-parts":[[2021,8]]},"abstract":"<jats:sec>\n                    <jats:title>Objective:<\/jats:title>\n                    <jats:p>To determine the association between repetitive subconcussive head impacts and neurobehavioral outcomes in youth tackle football players.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Using helmet-based sensors, we measured head impacts for 3 consecutive seasons of play in 29 male players age 9-11. Cumulative impact g\u2019s were calculated. Players completed a battery of outcome measures before and after each season, including neuropsychological testing, vestibular-ocular sensitivity, and self- and parent-reported measures of symptoms and attention-deficit hyperactivity disorder (ADHD).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Average cumulative impact over 3 seasons was 13 900 g. High-intensity hits predicted worse change for self-reported social adjustment ( P = .001). Cumulative impact did not predict change in any of the outcome measures. History of ADHD, anxiety, and depression predicted worse change for self-reported symptoms and social adjustment, independent of head impacts. When players were stratified into 3 groups based on cumulative impact across all 3 seasons, differences in outcome measures existed prior to the start of the first season. These differences did not further increase over the course of the 3 seasons.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Over 3 consecutive seasons of youth tackle football, we found no association between cumulative head impacts and neurobehavioral outcomes. Larger sample sizes and longer follow-up times would further assist in characterizing this relationship.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/08830738211004490","type":"journal-article","created":{"date-parts":[[2021,4,9]],"date-time":"2021-04-09T09:18:49Z","timestamp":1617959929000},"page":"768-775","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["Subconcussive Head Impacts and Neurocognitive Function Over 3 Seasons of Youth Football"],"prefix":"10.1177","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5177-7715","authenticated-orcid":false,"given":"Sean C.","family":"Rose","sequence":"first","affiliation":[{"name":"Division of Child Neurology, Nationwide Children\u2019s Hospital and The Ohio State University, Columbus, OH, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keith Owen","family":"Yeates","sequence":"additional","affiliation":[{"name":"Department of Psychology, Alberta Children\u2019s Hospital Research Institute, and Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joseph T.","family":"Nguyen","sequence":"additional","affiliation":[{"name":"Sansom Consulting, San Antonio, TX, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick M.","family":"Ercole","sequence":"additional","affiliation":[{"name":"Sansom Consulting, San Antonio, TX, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Natalie M.","family":"Pizzimenti","sequence":"additional","affiliation":[{"name":"MORE Foundation, Brighton, MI, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew T.","family":"McCarthy","sequence":"additional","affiliation":[{"name":"Summit Medical Group, Florham Park, NJ, 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