Natural History of Concussion in Sport Markers of Severity and Implications for Management
Michael Makdissi, David Darby, Paul Maruff, Antony Ugoni, Peter Brukner, Paul R McCrory
AMERICAN JOURNAL OF SPORTS MEDICINE | SAGE PUBLICATIONS INC | Published : 2010
BACKGROUND: Evidence-based clinical data are required for safe return to play after concussion in sport. PURPOSE: The objective of this study was to describe the natural history of concussion in sport and identify clinical features associated with more severe concussive injury, using return-to-sport decisions as a surrogate measure of injury severity. STUDY DESIGN: Cohort study (prognosis); Level of evidence, 3. METHODS: Male elite senior, elite junior, and community-based Australian Rules football players had preseason baseline cognitive testing (Digit Symbol Substitution Test, Trail-Making Test-Part B, and CogSport computerized test battery). Players were recruited into the study after a c..View full abstract
One or more of the authors has declared a potential conflict of interest: Drs Darby and Maruff were employees of and held stock in CogState Ltd, the suppliers of the computerized cognitive test battery used in this study. Dr McCrory received research grant support from CogState Ltd.