Table 1.

Cohort demographic information

Case no	Sex	Sport	Position	Other contact sports	Estimated years in sport	History of TBI with LOC	Family history NDD	PMI (days)
1	M	Soccer	Forward	No	18	NA	Nil	NA
2	M	Soccer	Defense	No	20	Yes	Nil	11
3	M	Soccer	Defense	No	35	Yes	Nil	4
4	M	Soccer	Defense	No	30	No	Mother and brother ‘dementia’	3
5	M	Soccer	Forward	No	18	No	Nil	1
6	M	Soccer	Defense	Rugby	15	No	Nil	3
7	M	Soccer	Defense	No	11	No	Mother PD	3
8	M	Rugby	Back	No	20	Yes	Nil	0.5
9	M	Rugby	Forward	No	35	Yes	Brother AD	2
10	M	Rugby	Forward	No	32	Yes	Nil	2
11	M	Rugby	Forward	Soccer	28	No	Nil	6

AD Alzheimer’s disease, LOC loss of consciousness for less than 30 min, NDD neurodegenerative disease, PD Parkinson’s disease, PMI post-mortem interval, TBI traumatic brain injury