Baseline characteristics of patients with mild traumatic brain injury and computed tomography findings of intracranial hemorrhage
| Characteristic | No. (%) of patients* n = 607 |
|---|---|
| Median age, yr (IQR) | 55 (37–70) |
| Male | 415 (68.4) |
| Mechanism of injury | |
| Fall | 234 (38.6) |
| Motor vehicle collision | 138 (22.7) |
| Struck by motor vehicle as pedestrian | 111 (18.3) |
| Struck by motor vehicle as cyclist | 44 (7.2) |
| Assault (blunt trauma) | 23 (3.8) |
| Motorcycle/all-terrain vehicle collision | 23 (3.8) |
| Other† | 34 (5.6) |
| Isolated head injury | 57 (9.4) |
| Finding on initial head CT | |
| Traumatic subarachnoid hemorrhage | 325 (53.5) |
| Subdural hematoma | 280 (46.1) |
| Intracerebral hemorrhage | 218 (35.9) |
| Skull fracture/pneumocephalus | 124 (20.4) |
| Intraventricular hemorrhage | 48 (7.9) |
| Epidural hematoma | 36 (5.9) |
| Concomitant other injuries | |
| Face + neck | 281 (46.3) |
| Thorax | 240 (39.5) |
| Abdomen/pelvis | 61 (10.0) |
| Spine | 186 (30.6) |
| Upper extremity | 212 (34.9) |
| Lower extremity | 167 (27.5) |
| External/burns/other | 19 (3.1) |
| Median Injury Severity Score (IQR) | 17 (14–24) |
| Total Injury Severity Score | |
| 1–15 | 197 (32.4) |
| 16–25 | 274 (45.1) |
| > 25 | 133 (21.9) |
| Missing | 3 (0.5) |
| Initial Glasgow Coma Scale score | |
| 15 | 374 (61.6) |
| 14 | 185 (30.5) |
| 13 | 48 (7.9) |
| Alcohol consumption (n = 392) | |
| No | 316 (80.6) |
| Yes, beyond legal limit | 60 (15.3) |
| Yes, trace limit | 16 (4.1) |