Table 1.
Sample Demographics and Clinical Characteristics at Study Entry
| |
Mild TBI |
OI |
Significance test |
|
|---|---|---|---|---|
| n = 143 | n = 74 | t/χ2 | p value | |
| Age at injury | 0.565 | 0.573 | ||
| M (SD) | 12.56 (2.61) | 12.35 (2.37) | ||
| Range | 8.04–16.95 | 8.17–16.93 | ||
| Sex | 0.053 | 0.817 | ||
| % Male | 66.4 | 64.9 | ||
| Race | 8.297* | 0.040 | ||
| % White | 52.4 | 37.8 | ||
| % Black | 35.0 | 43.2 | ||
| % Multi-racial | 9.8 | 18.9 | ||
| % Other | 2.8 | 0.0 | ||
| Median household | 1.844 | 0.067 | ||
| income1 | ||||
| M (SD) | 63K ± 34K | 54K ± 33K | ||
| Range | 7K–244K | 11K–177K | ||
| Years of maternal education | 2.354* | 0.020 | ||
| M (SD) | 13.97 (2.37) | 13.19 (2.21) | ||
| Range | 9–18 | 9–18 | ||
| Days post-injury baseline follow-up | –1.372 | 0.172 | ||
| M (SD) | 10.12 (2.79) | 10.68 (2.91) | ||
| Range | 3–15 | 4–18 | ||
| 3-month follow-up | –1.440 | 0.152 | ||
| M (SD) | 98.59 (12.66) | 101.58 (12.36) | ||
| Range | 76–132 | 79–131 | ||
| 6-month follow-up | 1.575 | 0.117 | ||
| M (SD) | 191.56 (13.20) | 188.04 (10.70) | ||
| Range | 167–229 | 171–215 | ||
| Injury setting | 0.149 | 0.699 | ||
| % Sport-related | 78.6 | 80.9 | ||
| Injury mechanism | 8.941* | 0.030 | ||
| % Fall | 33.3 | 43.8 | ||
| % Struck object | 26.2 | 24.7 | ||
| % Struck person | 25.5 | 9.6 | ||
| % Other | 14.9 | 21.9 | ||
| Injury Characteristics2b | ||||
| % experienced LOC | 27.1% | |||
| % experienced PTA | 38.8% | — | — | — |
| % GCS <15 | 11.7% | |||
a
Based on 2010 Census tract.
b
Mild TBI group only.
*
Group difference significant, p < 0.05.
M, mean; SD, standard deviation; LOC, loss of consciousness; PTA, post-traumatic amnesia.