Table 2.
HTEC determined TBI characteristics.
| Placebo (n=24) |
Low (n=20) |
Medium (n=21) |
High (n=29) |
|
|---|---|---|---|---|
| Age at injury, years | 27.2±12.4 | 24.5±12.1 | 22.6±12.5 | 31.3±12.9 |
| mTBI recency, years | 14.9±11.3 | 19.2±13.8 | 17.1±13 | 16.4±13.5 |
| mTBI recency range, years | 0 – 40 | 1 – 50 | 2 – 44 | 0 – 48 |
| Number of TBIs | ||||
| 1 | 5 (21%) | 4 (20%) | 2 (9%) | 4 (14%) |
| 2–3 | 11 (45%) | 6 (30%) | 11 (52%) | 14 (48%) |
| 4–5 | 7 (29%) | 6 (30%) | 5 (24%) | 6 (21%) |
| >5 | 1 (4%) | 4 (20%) | 3 (14%) | 5 (17%) |
| Maximum | 8 | 30 | 50 | 30 |
| Average, number | 3±2 | 5±6 | 5±10 | 4±6 |
| Type | ||||
| Blast | 1 (4%) | 2 (10%) | 1 (5%) | 4 (14%) |
| Fall | 7 (30%) | 3 (15%) | 3 (14%) | 6 (21%) |
| Sport | 2 (8%) | 3 (15%) | 5 (24%) | 2 (7%) |
| Motor Vehicle Collision (MVC) | 3 (12%) | 4 (20%) | 5 (24%) | 9 (31%) |
| Pedestrian MVC | 0 (0%) | 1 (5%) | 1 (5%) | 1 (3%) |
| Other | 11 (46%) | 7 (35%) | 6 (29%) | 7 (24%) |
| Loss of Consciousness | ||||
| None | 15 (62%) | 12 (60%) | 12 (57%) | 16 (55%) |
| <5 minutes | 7 (30%) | 6 (30%) | 5 (24%) | 7 (24%) |
| 5–60 minutes | 1 (4%) | 0 (0.0%) | 3 (14%) | 4 (14%) |
| >60 minutes | 1 (4%) | 2 (10%) | 1 (5%) | 2 (7%) |
| Post-traumatic Amnesia, yes | 11 (46%) | 13 (65%) | 5 (24%) | 8 (28%) |
Data are presented as mean ± standard deviation, or n (%). Continuous variables analyzed via an unpaired two-tail t-test and categorical variables via chi-square.