Table 1.
Demographic and clinical information of included subjects with mild traumatic brain injury.
| Variable |
Met158 (N = 70) |
Val158/Val158 (N = 23) |
Significance (p) |
|---|---|---|---|
| Age (y) | |||
| Mean ± SD | 40 ± 17 | 42 ± 14 | 0.682 |
| Gender | |||
| Male | 42 (60%) | 14 (61%) | 0.941 |
| Female | 28 (40%) | 9 (39%) | |
| Race | |||
| Caucasian | 52 (80%) | 13 (20%) | 0.032 |
| African-American/African | 6 (46%) | 7 (54%) | |
| Other races | 12 (80%) | 3 (20%) | |
| Pre-existing psychiatric disorder | |||
| No | 47 (67%) | 10 (44%) | 0.043 |
| Yes | 23 (33%) | 13 (56%) | |
| Substance abuse | |||
| No | 56 (80%) | 15 (65%) | 0.148 |
| Yes | 14 (20%) | 8 (35%) | |
| Mechanism of injury | |||
| Motor vehicle crash | 22 (31%) | 2 (9%) | 0.140 |
| Cyclist/pedestrian hit | 15 (21%) | 6 (26%) | |
| Fall | 21 (30%) | 8 (35%) | |
| Assault | 8 (11%) | 6 (26%) | |
| Struck by/against object | 4 (6%) | 1 (4%) | |
| ED arrival GCS | |||
| 13 | 1 (1%) | 0 (0%) | 0.817 |
| 14 | 12 (17%) | 5 (22%) | |
| 15 | 57 (81%) | 18 (78%) |
Race distributions are reported as row percentages. All other distributions reported as column percentages. The race subgroup “Other races” was combined due to individual small sample sizes of Asian (N = 6; Met158 = 5, Val158/Val158 = 1), American Indian/Alaskan Native (N = 1; Met158 = 1), Hawaiian/Pacific Islander (N = 2; Met158 = 1, Val158/Val158 = 1), and more than one race (N = 6; Met158 = 5, Val158/Val158 = 1).