Table 1.
Demographics and clinical characteristics.
| Variable | BRCH (% yes) | CTRL (% yes) | p |
|---|---|---|---|
| Right-handed | 90 | 85.7 | 0.703 |
| Experience with large arms (10 exp) | 50 | 21.4 | 0.092 |
| Experience with artillery | 30 | 7.1 | 0.105 |
| Experience with small explosives | 25 | 57.1 | 0.058 |
| Experience with non-breaching large explosives | 40 | 7.1 | 0.033 |
| Back Issues | 60 | 36 | 0.163 |
| Change in Appetite | 5 | 0 | 0.396 |
| Head Injury, Concussion, LOC | 70 | 43 | 0.113 |
| Avoiding Reminding Stressful Activities | 0 | 7 | 0.225 |
| Headaches | 15 | 14 | 0.954 |
| Memory Problems | 65 | 29 | 0.037 |
| Ringing in Ears | 65 | 29 | 0.037 |
| Difficulty Decision Making | 0 | 7 | 0.225 |
| Diminished Hearing | 55 | 29 | 0.127 |
| Concentration Problems | 55 | 14 | 0.016 |
| Discharge From Ears | 5 | 0 | 0.396 |
| Change in Taste or Smell | 15 | 0 | 0.129 |
| Pain in Ear | 5 | 0 | 0.396 |
| Difficulty with Sleep | 50 | 36 | 0.409 |
| ENT Problems | 30 | 14 | 0.288 |
| Sleepwalking, Nightmares | 15 | 0 | 0.129 |
| Light-headedness | 10 | 0 | 0.223 |
| Dizziness, Vertigo | 10 | 14 | 0.703 |
| Eye Trouble | 20 | 7 | 0.298 |
| Balance Problems | 5 | 7 | 0.794 |
| Sensitivity to Light, Noise | 30 | 7 | 0.105 |
| Coordination Problems | 5 | 7 | 0.794 |
| Fatigue | 20 | 7 | 0.298 |
| Motion Sickness | 10 | 14 | 0.703 |
| Irritability | 55 | 14 | 0.016 |
| Gastrointestinal/Nausea | 5 | 0 | 0.396 |
| Repeated Disturbing Imagery | 5 | 0 | 0.396 |
| Physical Reaction | 0 | 7 | 0.225 |
| Depression | 15 | 7 | 0.484 |
| Anxiety | 20 | 7 | 0.298 |
| Stress | 15 | 14 | 0.954 |