Associated Press
Former tackle football players with severe forms of chronic traumatic encephalopathy, the degenerative brain disease linked to repeated head hits, doubled their risk of developing the disease for each 5.3 years they played, according to new study.
Scientists have known that more years playing tackle football is associated with thinking and memory deficits later in life. This study builds on that research and, for the first time, calculated the number of years played with levels of measurable disease in the brain.
The retrospective analysis in the new study was based largely on brains found to have C.