An updated study published Tuesday by the Journal of the American Medical Association on football players and the degenerative brain disease Chronic Traumatic Encephalopathy (CTE) reveals a striking result among NFL players.

The study examined the brains of deceased former football players (CTE can only be diagnosed after death) and found that 110 out of 111 brains of those who played in the NFL had CTE.

In the study, researchers examined the brains of 202 deceased former football players at all levels. Nearly 88 percent of all the brains, 177, had CTE. Three of 14 who'd played only in high school had CTE; 48 of 53 college players; 9 of 14 semiprofessional players; 7 of 8 Canadian Football League players.

The problems can arise years after the blows to the head have stopped.

The NFL's top health and safety official has acknowledged a link between football and CTE, and the league has begun to steer children away from playing the sport in its regular form.