Table 1.
Demographic and Injury Related Variables across Blast Exposure Groups
| 0 blasts(n=68) | 1 blast(n=123) | 2 blasts(n=178) | 3 blasts(n=106) | 4–10 blasts(n=98) | |||
|---|---|---|---|---|---|---|---|
| M(SD) | M(SD) | M(SD) | M(SD) | M(SD) | F (df) | p | |
| Age | 28.1 (9.1) | 25.5 (5.8) | 27.4 (7.4) | 26.9 (7.1) | 26.5 (5.7) | 2.11 (4,568) | 0.078 |
| Time since injury (days) | 218 (183) | 255 (206) | 220 (193) | 204 (165) | 181 (156) | 2.40 (4,565) | 0.049 |
| Deployment number | 1.5 (0.8) | 1.7 (1.2) | 1.5 (0.7) | 1.7 (0.9) | 1.8 (0.9) | 2.41 (4,540) | 0.048 |
| N (%) | N (%) | N (%) | N (%) | N (%) | p | |
|---|---|---|---|---|---|---|
| LOC | ||||||
| Yes | 60 (88.2) | 86 (69.9) | 148 (83.1) | 84 (79.2) | 76 (77.6) | 0.020 |
| No | 8 (11.8) | 37 (30.1) | 30 (16.9) | 22 (20.8) | 22 (22.4) | |
| LOC (Duration) | ||||||
| None | 8 (11.8) | 37 (30.1) | 30 (16.9) | 22 (20.8) | 22 (22.4) | 0.035 |
| <1 min | 37 (54.2) | 46 (37.4) | 107 (60.1) | 51 (48.1) | 49 (50.0) | |
| 1–15 min | 22 (32.6) | 38 (30.9) | 39 (21.9) | 30 (28.3) | 24 (24.5) | |
| 16–30 min | 1 (1.4) | 2 (1.6) | 2 (1.1) | 3 (2.8) | 3 (3.1) | |
| PTA (duration) | ||||||
| <1 min | 27 (39.6) | 37 (30.1) | 82 (46.0) | 40 (37.6) | 35 (35.7) | 0.237 |
| 1–15 min | 22 (32.4) | 54 (43.9) | 56 (31.5) | 36 (34.0) | 29 (29.6) | |
| 16–59 min | 8 (11.8) | 14 (11.4) | 22 (12.4) | 15 (14.2) | 19 (19.4) | |
| 1–24 h | 11 (16.2) | 18 (14.6) | 18 (10.1) | 15 (14.2) | 15 (15.3) | |
| TBI severity | ||||||
| Complicated | 4 (5.9) | 2 (1.6) | 7 (3.9) | 1 (.9) | 1 (1.0) | 0.182 |
| Uncomplicated | 64 (94.1) | 121 (98.4) | 171 (96.1) | 105 (99.1) | 97 (99.0) | |
| Rank | ||||||
| E1–4 | 42 (61.8) | 80 (65.0) | 107 (60.1) | 59 (55.7) | 49 (50.0) | 0.208 |
| E5+ | 26 (38.2) | 43 (35.0) | 71 (39.9) | 47 (44.3) | 49 (50.0) | |
SD, standard deviation; LOC, loss of consciousness; PTA, post-traumatic amnesia; TBI, traumatic brain injury.