Does soccer headgear reduce the incidence of sport-related concussion? A cluster, randomised controlled trial of adolescent athletes.

Background: There have been no large randomised controlled trials to determine whether soccer headgear reduces the incidence or severity of sport-related concussion (SRC) in US high school athletes.

Objective: We aimed to determine whether headgear reduces the incidence or severity (days out from soccer) of SRCs in soccer players.

Methods: 2766 participants (67% female, age 15.