ArticleBritish journal of sports medicine2006
No cumulative effects for one or two previous concussions.
Article in British journal of sports medicine, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 3 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
37 citing papers in PubMed, 3 syntheses or guidelines pooled it.
- Assessment, management and knowledge of sport-related concussion: systematic review.Sports medicine (Auckland, N.Z.) · 2014Pooled it
- Pooled it
- National Athletic Trainers' Association position statement: management of sport concussion.Journal of athletic trainingGuideline
- Individual and Combined Effects of Sport-Related Concussion and Anterior Cruciate Ligament Injury on Neurocognitive and Neuromechanical Reaction Time.Journal of athletic training · 2025Article
- A Normative Reference vs. Baseline Testing Compromise for ImPACT: The CARE Consortium Multiple Variable Prediction (CARE-MVP) Norms.Sports medicine (Auckland, N.Z.) · 2020Article
- Remote concussion history does not affect visually-guided reaching in young adult females.Concussion (London, England) · 2019Article
- Mild Traumatic Brain Injury Burden Moderates the Relationship Between Cognitive Functioning and Suicidality in Iraq/Afghanistan-Era Veterans.Journal of the International Neuropsychological Society : JINS · 2019Article
- Neurometabolic indicators of mitochondrial dysfunction in repetitive mild traumatic brain injury.Concussion (London, England) · 2017Review
- Long-term Effects of Adolescent Sport Concussion Across the Age Spectrum.The American journal of sports medicine · 2017Article
- A case matched study examining the reliability of using ImPACT to assess effects of multiple concussions.BMC psychology · 2017Article
- Neuropsychiatric aspects of concussion: acute and chronic sequelae.Concussion (London, England) · 2017Review
- Long-Term Cognitive and Neuropsychiatric Consequences of Repetitive Concussion and Head-Impact Exposure.Journal of athletic training · 2017Review
- Long-Term Effects of Concussion on Electrophysiological Indices of Attention in Varsity College Athletes: An Event-Related Potential and Standardized Low-Resolution Brain Electromagnetic Tomography Approach.Journal of neurotrauma · 2016Article
- Evidence of a conservative gait strategy in athletes with a history of concussions.Journal of sport and health science · 2016Article
- Multiple Past Concussions in High School Football Players: Are There Differences in Cognitive Functioning and Symptom Reporting?The American journal of sports medicine · 2016Article
- Sports-related concussions - media, science and policy.Nature reviews. Neurology · 2016Review
- Football Players' Head-Impact Exposure After Limiting of Full-Contact Practices.Journal of athletic training · 2016Article
- Epidemiology of sports-related concussion in seven US high school and collegiate sports.Injury epidemiology · 2015Article
- Characteristics of prolonged concussion recovery in a pediatric subspecialty referral population.The Journal of pediatrics · 2014Article
- Multiple prior concussions are associated with symptoms in high school athletes.Annals of clinical and translational neurology · 2014Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSports medicine clinicians and the general public are interested in the possible cumulative effects of concussion.
objectiveTo examine whether athletes with a history of one or two previous concussions differed in their preseason neuropsychological test performances or symptom reporting.
methodParticipants were 867 male high school and university amateur athletes who completed preseason testing with ImPACT version 2.0. They were sorted into three groups on the basis of number of previous concussions. There were 664 athletes with no previous concussions, 149 with one previous concussion, and 54 with two previous concussions. Multivariate analysis of variance was conducted using the verbal memory, visual memory, reaction time, processing speed, and postconcussion symptom composite scores as dependent variables and group membership as the independent variable.
resultsThere was no significant multivariate effect, nor were there any significant main effects for individual scores. There was no measurable effect of one or two previous concussions on athletes' preseason neuropsychological test performance or symptom reporting.
conclusionIf there is a cumulative effect of one or two previous concussions, it is very small and undetectable using this methodology.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.