>> A major study out Tuesday that is arguably the most damning evidence yet of football's harmful effects on the brain. Research on 202 former football players showing that nearly 90% of them had CTE, Chronic Traumatic Encephalopathy. Reuters correspondent, Scott Malone.>> Right now, the condition can only be diagnosed after death since it requires taking a sample of brain tissue.
And the researchers noted that their findings could be skewed by the fact that they don't have a universal database to draw on. And that the family members who donated their loved one's brains to the project may be those who were most concerned about possible symptoms of CTE.>> The brains of deceased players ranging from Hall of Fame quarterback Ken Stabler to high schoolers.
Boston neuropathologist Dr. Ann McKee conducting the broadest review yet. The disease which causes multiple symptoms including memory loss, depression and dementia, spurring controversy and alleged coverup and a class action lawsuit against the NFL leading to a $1 billion settlement. Of those examined, 111 were pros, all but one with CTE.
The report does not conclude that all players are prone to the disease. There could be genetic or other environmental factors, but sounds an even louder alarm when it comes to the possible linkage between CTE and repeated head blows. The NFL issuing a statement saying, the report is important for advancing science related to head trauma.
And quote, we'll continue to work with a wide range of experts to improve the health of current and NFL former athletes.