New study of nearly 2,000 former NFL players found that 34 percent think they have CTE, a condition it is not yet possible to confirm in a living person. Former players who believed they had CTE reported significantly more cognitive problems, depression, suicidality, chronic pain, and other problems than those who did not have concerns.

A new study of nearly 2,000 former NFL players shows that about one-third believe they have chronic traumatic encephalopathy (CTE), a neuropathological condition linked to repeated head trauma that can only be diagnosed through a post-mortem exam of the brain.

Roughly one-third of former professional football players surveyed believe they have CTE, a study found. The brain disease is linked to repeated hits to the head.

Far from the lime light of the football field, former NFL players are asking themselves a chilling question: do I have CTE? About a third of surveyed football players in a new study in the journal JAMA Neurology think they have CTE,

CTE also reported having suicidal thoughts Approximately one-third of former football players believe they have a degenerative brain disease known as chronic traumatic encephalopathy (CTE), according to a new survey.

About 35% of 1,980 retired professional football players who participated in a survey said they believe they have CTE, Harvard University study finds.