Hockey players' chances of developing concussion-related brain injury increase with every year they spend on the ice, a new study finds. The odds of having chronic traumatic encephalopathy, or CTE, increase among hockey players 34% for each year played,

Eighteen of the 19 NHL players whose brains were studied after death were discovered to have chronic traumatic encephalopathy.

The new study looking at 77 donor brains, from former youth to the professional hockey players, found years of play and repetitive hits are major indicators of CTE.