Quote:McKee cautions that the study has some limitations and doesn’t attempt to pinpoint a CTE rate. The brains studied were mostly donated by concerned families, which means they weren’t random and not necessarily representative of all men who have played football.
“A family is much more likely to donate if they’re concerned about their loved one - if they’re exhibiting symptoms or signs that are concerning them, or if they died accidentally or especially if they committed suicide,” she said. “It skews for accidental deaths, suicide and individuals with disabling or discomforting symptoms."
This is a major flaw in every CTE & football study since the first time Dr. Omalu put a slide of Mike Webster's brain tissue under a microscope. They're all working backwards from a conclusion instead of isolating variables to prove legitimate causality. Webster himself was a known drug addict with a deep family history of neuropsychological issues. A sh*tload of the football players who have been the subjects of these studies were also on steroids for long periods of time and/or had substance abuse issues. That could be what screwed their brains up for all we know considering none of these post-mortem "Yes or no: do they have it?" studies ever account for such things. More recent and scientifically sound studies by the likes of the Mayo Clinic and WHO trying to establish a significant, definite link between concussion--regardless of the cause--and long-term degenerative effects are painting a much different picture.
A very recent article in the
Journal of Neurology, Nuerosurgery, and Psychiatry came down hard on the conclusions being drawn and publicized over the past few years. One oft-quoted study it noted professed that of 3349 retired NFL players studied, those having died from Parkinson's, Alzheimer's, and ALS amounted to 3 times that of the general population. Granted, that meant a whopping 17 people out of 3349 as opposed to 6 people out of 3349, and among those same 3349, the overall death rate of the retired pro players, adjusted for age, was
half that of the general population (296 had already outlived their non-NFL-playing peers at the time of the research), but, hey, good luck getting Junior's mom to tune into or click on some boring headline about NFL players living longer than everybody else.
You can read the article in Medscape if you're willing to create a login & password. The title is "Concussion, Dementia and CTE: Are We Getting It Very Wrong?"
Even besides that, times have changed. Assessment & treatment are vastly different now that they were when these skulls on the autopsy table played. There's literally no comparison yet between the guy 30 years ago who blacked out for 15 seconds, answered correctly to "Do you see fingers?" when he woke up, and didn't miss another play the rest of the season and somebody who gets knocked a little loopy then sits out of contact until he passes numerous benchmarks confirming full recovery, as is the case today.