Nearly all of the former National Football League players studied by the largest U.S. brain bank tested positive for the brain disease associated with concussions, Frontline reported Friday.
Chronic traumatic encephalopathy, or CTE, has been identified in 87 of 91 deceased players examined by researchers with the Department of Veterans Affairs and Boston University. That's about 96 percent. CTE is linked to repeated head injuries and can cause memory loss, depression and dementia, among other effects.
Player safety concerns have shaken the league in recent years as more research has suggested a connection between head trauma and long-term health issues. The lab has identified CTE in the brains of 131 of 165 examined individuals who played football at the high school level or above, according to the report.