Table 1.
Demographic data for No History and Concussion groups.
| Variable | Group | |||
|---|---|---|---|---|
| No History | Concussion | Diagnosed1 | Concussion-like History1 | |
| Sample size | 15 | 16 | 9 | 7 |
| Age (in years) | 21 ± 2.5 | 20 ± 2.3 | 21 ± 2.7 | 19 ± 1.2 |
| Sex | 8M, 7F | 12M, 4F | 7M, 2F | 5M, 2F |
| Body mass index | 24 ± 5 | 25 ± 5 | 24 ± 4 | 28 ± 7 |
| Education (years) | 15 ± 1.4 | 14.6 ± 2.2 | 15 ± 2.4 | 13 ± 1.1 |
| Number of concussions | – | 2 ± 1.2 | 2 ± 1.5 | 2 ± 1.1 |
| Age of last injury (years) | – | 16 ± 1.6 | 16 ± 1.4 | 16 ± 2 |
| Time since last injury (years) | – | 4 ± 3 | 5 ± 3 | 3 ± 2 |
| Loss of consciousness | – | 6 | 5 | 1 |
| Amnesia | – | 7 | 6 | 1 |
| Duration of symptoms (days) | – | 4 ± 3.6 | 5 ± 4.11 | 3 ± 2.9 |
| Years playing sports—high school2,3 | 3 ± 1.5 | 4 ± 0.9 | 3.3 ± 1.1 | 3.8 ± 0.4 |
| Years playing sports—middle school4,5 | 2 ± 1.4 | 3 ± 0.5 | 3 ± 0.5 | 3 ± 0.5 |
Where appropriate data are reported as mean ± standard deviation. 1. These subgroups are derived from the Concussion History group. 2. No History group reported playing: No Sport (3), Running (2), Tennis (2), Swimming (2), Baseball/Softball (2), Basketball (1), Soccer (1), Figure Skating (1), Wrestling (1). 3. Concussion History group reported playing: Soccer (6), Football (4), Baseball (2), Track (2), Volleyball (1), Wresting (1). 4. No History group reported playing: No Sport (3), Basketball (3), Running (3), Swimming (2), Baseball/Softball (1), Soccer (1), Figure Skating (1), Skiing (1). 5. Concussion History group reported playing: Soccer (7), Football (5), Basketball (2), Baseball (1), Gymnastics (1).