Table 1.
Sample characteristics, mean (SD).
| Overall sample (n = 80) | mTBI+blast (n = 51) | mTBI-blast (n = 29) | F or χ2 | p | |
|---|---|---|---|---|---|
| Age | 31.64 (7.28) | 31.25 (7.45) | 32.31 (7.05) | 0.39 | 0.53 |
| Education | 13.83 (1.58) | 13.80 (1.58) | 13.86 (1.62) | 0.03 | 0.88 |
| WRAT-4 reading standard score Missing | 101.59 (11.77) 2 | 102.10(11.53) 0 | 100.63 (12.43) 2 | 0.27 | 0.61 |
| Sex (% Male) | 89% | 98% | 72% | 14.45 | 0.001a |
| ETHNICITY | |||||
| Caucasian African American Hispanic Asian Native American |
50% 9% 30% 10% 1% |
55% 4% 29% 10% 2% |
42% 17% 31% 10% 0% |
5.19 | 0.27b |
| BRANCH OF SERVICE | |||||
| Navy Army Marines Air Force |
29% 28% 38% 6% |
14% 35% 47% 4% |
55% 14% 21% 10% |
18.91 | 0.000b |
| PCL-M Total | 46.96 (18.64) | 49.73 (18.65) | 42.11 (17.91) | 3.17 | 0.08 |
| BDI-II Total | 21.64 (12.45) | 21.66 (12.42) | 21.59 (13.19) | 0.000 | 0.98 |
| NSI total Missing | 36.08(17.85) 6 | 38.98 (17.25) 5 | 29.68 (17.23) 1 | 6.21 | 0.02 |
| Total number of TBIs | 2.61 (1.45) | 3.06 (1.49) | 1.83 (0.85) | 10.97 | 0.000 |
| % with single vs. multiple TBI history | 23%, 77% | 12%, 80% | 41%, 59% | 9.30 | 0.002a |
| Months since most recent TBI Missing | 58.72 (42.03) 1 | 58.24 (43.42) 1 | 59.55 (40.23) 0 | 0.02 | 0.90 |
| MOST SIGNIFICANT INJURY | |||||
| % LOC % AOC |
62% 38% |
61% 39% |
65% 35% |
0.18 | 0.67 |
| MOST SIGNIFICANT TBI TYPE | |||||
| % Blast % Blunt % Blast with Secondary/Tertiary Blunt |
23% 67% 10% |
35% 49% 16% |
0% 100% 0% |
21.90 | 0.000a |
WRAT4, Wide Range Achievement Test 4; TBI, traumatic brain injury; LOC, loss of consciousness; AOC, alteration of consciousness; PTA, post-traumatic amnesia.
a
Fischer's Exact Test.
b
Likelihood Ratio.
Bold values indicate significant p-values.