{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T00:57:43Z","timestamp":1785373063037,"version":"3.55.0"},"reference-count":66,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2020,6,3]],"date-time":"2020-06-03T00:00:00Z","timestamp":1591142400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/100006425","name":"National Football League Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006425","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006973","name":"ImPACT Applications","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006973","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Mooney-Reed Charitable Foundation, Boston Bolts, Heinz Family Foundation, and Spaulding Research Institute"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,10,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>Preexisting attention-deficit\/hyperactivity disorder (ADHD) may be a risk factor for worse outcome following sport-related concussion. We used a statistical and psychometric approach known as network analysis to examine the architecture of physical, cognitive, and emotional symptoms at preseason baseline among student athletes with ADHD.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Method<\/jats:title>\n                  <jats:p>A cohort of 44,527 adolescent student athletes completed baseline preseason testing with ImPACT\u00ae between 2009 and 2015. A subsample of athletes reporting a diagnosis of ADHD and at least one symptom were included in this study (N\u00a0=\u00a03,074; 14\u201318\u00a0years old, 32.7% girls). All participants completed the 22-item Post-Concussion Symptom Scale at preseason baseline.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>Student athletes reported high frequencies of difficulty concentrating (boys\/girls\u00a0=\u00a050.7%\/59.4%), emotional symptoms (nervousness: boys\/girls\u00a0=\u00a030.2%\/51.0%; irritability: boys\/girls\u00a0=\u00a023.6%\/34.8%; sadness: boys\/girls\u00a0=\u00a021.4%\/39.7%), sleep\/arousal-related symptoms (trouble falling asleep: boys\/girls\u00a0=\u00a039.5%\/49.4%; sleeping less than usual: boys\/girls\u00a0=\u00a036.2%\/43.4%; and fatigue: boys\/girls\u00a0=\u00a029.8%\/36.4%), and headaches (boys\/girls\u00a0=\u00a027.6%\/39.0%) during preseason baseline testing. The most central symptoms included dizziness, which was related to multiple somatic symptoms, and increased emotionality, which was related to a cluster of emotional symptoms. Girls reported symptoms at a greater frequency than boys, and there was evidence for variance in the global strength of the symptom network across gender, but not specific intersymptom relationships.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>In the absence of injury, symptoms that commonly occur after concussion interact and potentially reinforce each other among student athletes with ADHD at preseason. Symptoms common in ADHD (i.e., difficulty concentrating) are not necessarily the most central within the symptom network. These findings may inform more precise interventions for athletes with ADHD and prolonged recovery following concussion.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/arclin\/acaa030","type":"journal-article","created":{"date-parts":[[2020,5,26]],"date-time":"2020-05-26T11:08:52Z","timestamp":1590491332000},"page":"1109-1122","source":"Crossref","is-referenced-by-count":18,"title":["Network Structure of Physical, Cognitive, and Emotional Symptoms at Preseason Baseline in Student Athletes with Attention-Deficit\/ Hyperactivity Disorder"],"prefix":"10.1093","volume":"35","author":[{"given":"Grant L","family":"Iverson","sequence":"first","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA"},{"name":"Spaulding Rehabilitation Hospital and Spaulding Research Institute, Charlestown, Boston, MA, USA"},{"name":"Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Charlestown, Boston, MA, 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