Among the nation's high school students, 15 percent report having experienced at least one concussion during the past year, according to the 2017 Youth Risk Behavior Survey. Concussion is defined as "when a blow or a jolt to the head causes problems such as headaches, dizziness, being dazed or confused, difficulty remembering or concentrating, vomiting, blurred vision, or being knocked out."
Seventeen percent of boys and 13 percent of girls report a concussion in the past year. The prevalence of concussion varies greatly by the number of sports played...
Percent of high school students with at least one concussion in the past year
Play no sports: 7.6%
Play one sport: 16.7%
Play two sports: 22.9%
Play three+ sports: 30.3%
Source: CDC, Self-Reported Concussions from Playing a Sport or Being Physically Active among High School Students—United States, 2017
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