Table. Demographic Characteristics.
| Mean(SD) | ||||
|---|---|---|---|---|
| Characteristic | Control Participants | Participants With MCI and No Concussion History | Athletes | Athletes With MCI and Concussion History |
| Age, y | 59.0 (12) | 68.0 (8.3) | 58.1 (13) | 70.8 (4.33) |
| Education, y | 15.9 (2.4) | 15.5 (4.6) | 16.5 (0.9) | 16.0 (0) |
| Race/ethnicity, No. | ||||
| White | 19 | 5 | 11 | 8 |
| African American | 2 | 0 | 9 | 0 |
| Asian | 0 | 1 | 0 | 0 |
| IQ | 111.6 (9.4) | NA | 111.0 (10.0) | 110.9 (9.1) |
| NFL experience, y | NA | NA | 8.9 (4.2) | 8.8 (1.6) |
| Concussions, No. | ||||
| Grade 1 | NA | NA | 1.9 (2.2) | 1.6 (1.9) |
| Grade 2 | NA | NA | 0.3 (0.6) | 0.1 (0.4) |
| Grade 3 | NA | NA | 1.2 (1.5) | 1.9 (1.1) |
| Total | NA | NA | 3.8 (3.5) | 4.6 (3.6) |
Abbreviations: MCI, mild cognitive impairment; NA, not applicable; NFL, National Football League.