| Characteristic | Chronic traumatic encephalopathy | |
|---|---|---|
| Present | Not present | |
| Number of donors | 12 | 9 |
| Age at death (years), mean, (SD) | 48 (19) | 75 (19) |
| Sex | ||
| Men | 12 | 7 |
| Women | 0 | 2 |
| Sporting history | ||
| Australian rules football | 6 | 2 |
| Rugby union/league | 5 | 4 |
| Other* | 1 | 3 |
| Active playing period (years), mean (SD) | 15 (5) | 16 (10) |
| Sporting level | ||
| Professional | 8 | 3 |
| Amateur/representative | 4 | 6 |
| Chronic traumatic encephalopathy stage 5 | ||
| Low | 10 | — |
| High | 2 | — |
| Other neuropathology | ||
| None | 6 | 1 |
| Alzheimer disease | 3 | 6 |
| Age‐related tau astrogliopathy | 3 | 5 |
| Cerebrovascular pathology | 4 | 6 |
| Other † | 1 | 5 |
| Cause of death | ||
| Suicide | 6 | 1 |
| Other | 6 | 8 |
SD = standard deviation.
*
Boxing, football (soccer), basketball, or equestrian sport.
†
Frontotemporal dementia, Lewy body disease, or limbic‐predominant age‐related TAR DNA‐binding protein‐43 encephalopathy.