• Am J Sports Med · Dec 2016

    Multiple Past Concussions in High School Football Players: Are There Differences in Cognitive Functioning and Symptom Reporting?

    • Brian L Brooks, Rebekah Mannix, Bruce Maxwell, Ross Zafonte, Paul D Berkner, and Grant L Iverson.
    • Neurosciences Program (Brain Injury and Rehabilitation), Alberta Children's Hospital, Calgary, Alberta, Canada brian.brooks@albertahealthservices.ca.
    • Am J Sports Med. 2016 Dec 1; 44 (12): 3243-3251.

    BackgroundThere is increasing concern about the possible long-term effects of multiple concussions, particularly on the developing adolescent brain. Whether the effect of multiple concussions is detectable in high school football players has not been well studied, although the public health implications are great in this population.PurposeTo determine if there are measureable differences in cognitive functioning or symptom reporting in high school football players with a history of multiple concussions.Study DesignCross-sectional study; Level of evidence, 3.MethodsParticipants included 5232 male adolescent football players (mean [±SD] age, 15.5 ± 1.2 years) who completed baseline testing between 2009 and 2014. On the basis of injury history, athletes were grouped into 0 (n = 4183), 1 (n = 733), 2 (n = 216), 3 (n = 67), or ≥4 (n = 33) prior concussions. Cognitive functioning was measured by the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) battery, and symptom ratings were obtained from the Post-Concussion Symptom Scale.ResultsThere were no statistically significant differences between groups (based on the number of reported concussions) regarding cognitive functioning. Athletes with ≥3 prior concussions reported more symptoms than did athletes with 0 or 1 prior injury. In multivariate analyses, concussion history was independently related to symptom reporting but less so than developmental problems (eg, attention or learning problems) or other health problems (eg, past treatment for psychiatric problems, headaches, or migraines).ConclusionIn the largest study to date, high school football players with multiple past concussions performed the same on cognitive testing as those with no prior concussions. Concussion history was one of several factors that were independently related to symptom reporting.© 2016 The Author(s).

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