Table 2.
Donor demographic statistics
| Controls | CTE | p-Value | |
|---|---|---|---|
| Sample size (n) | 16 | 25 | |
| Age at death (S.E.M), range, years | 65 (3), 46–86 | 62 (4), 31–89 | P = 0.694 |
| Race or ethnicity (n) | |||
| White/Caucasian, n (%) | 14 (88%) | 18 (72%) | |
| Black/African American, n (%) | 1 (6%) | 6 (28%) | |
| Hispanic, n (%) | 1 (6%) | 0 (0%) | |
| RHI y/n (%exposed) | 7/9 (44%) | 25/0 (100%) | |
| Exposure source, n (%) | |||
| Football | 6 (38%) | 25 (100%) | |
| Combat veteran | 0 (0%) | 2 (8%) | |
| Rugby | 2 (12%) | 2 (8%) | |
| Soccer | 0 (0%) | 1 (4%) | |
| Wrestling | 1 (6%) | 0 (0%) | |
| Hockey | 1 (6%) | 3 (12%) | |
| Boxing | 1 (6%) | 2 (8%) | |
| Lacrosse | 0 (0%) | 1 (4%) | |
| RHI Exposure years (S.E.M.) | 11(3)* | 15(1) | P = .284 |
| CTE Severity | |||
| Low | 0% (0) | 48% (12) | |
| High | 0% (0) | 52% (13) |
Data are presented as mean (SEM) years for age at death and contact sports exposure and as # yes/# no (%) unless otherwise indicated
CTE: chronic traumatic encephalopathy; RHI: repetitive head impacts
*data was unavailable for one participant in this group