Wearing the Revolution helmet was associated with approximately a 31% decreased relative risk and 2.3% decreased absolute risk for sustaining a concussion in this cohort study. The relative risk estimate was 0.69 (95% confidence interval = 0.499– 0.958). In the total sample, the concussion rate in athletes wearing the Revolution was 5.3% and in athletes wearing standard helmets was 7.6%. Following a concussion, players were reevaluated at various time intervals until recovery was complete. Athletes underwent computerized neurocognitive testing through the use of ImPACT at the beginning of the study. (n = 1,173) and the remainder of the sample used standard helmets (n = 968). Approximately half of the sample wore the Revolution helmet manufactured by Riddell, Inc. Participants were 2,141 high school athletes from Western Pennsylvania. This was a three-year, prospective, naturalistic, cohort study.
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