The largest study to date of CTE shows number of concussion does not completely correlate to likelihood of CTE diagnosis. In fact, the number of hits to the head is a better predictor.

As many as 3.8 million sports-related concussions occur every year. A concussion is a brain injury caused by a blow or bump to the head. There’s lots of research that looks into which sports are more prone to concussions or how concussions differ among genders. But what about between races?