18 For nominal scaled variables, raw counts of injured and uninjured participants (eg, PFP incidence in men and women) were extracted and used to calculate risk ratios (RR) with 95% CIs, with a small ...
There was no significant difference in the rate of concussion (RR 0.97, CI 0.61 to 1.54) or neck injury (CI 0.43 to 3.16) between full and partial protection. In those who sustained concussion players ...
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