Table 1 Patient characteristics in all patients with mild traumatic brain injury and in the cohort Trondheim MTBI follow-up study
From: The epidemiology of mild traumatic brain injury: the Trondheim MTBI follow-up study
Variable | All patients identified with MTBI | Trondheim MTBI follow-up study |
|---|---|---|
n = 732 | n = 379 | |
Age, median [IQR] | 28 [21,42] | 25 [20,40] |
Age, mean (SD) | 31.7 (12.7) | 31.2 (13.0) |
Male, n (%) | 450 (62) | 247 (65) |
Cause of injury | ||
Fall, n (%) | 267 (37) | 136 (36) |
Violence, n (%) | 144 (20) | 65 (17) |
Bicycle, n (%) | 98 (13) | 58 (15) |
Sport, n (%) | 81 (11) | 54 (14) |
MVA, n (%) | 83 (11) | 43 (11) |
Struck object, n (%) | 37 (5) | 17 (5) |
Other, n (%) | 9 (1) | 3 (1) |
Unknown, n (%) | 13 (2) | 3 (1) |
Alcohol influence, n (%) | unknown | 169 (45) |
Time of injury | ||
Weekend, n (%) | 38 (53)a | 210 (55) |
Head CT performed (%) | 300 (79) | |
Intracranial traumatic CT findings (yes/no) | 37 (6) | 21 (7) |
GCS score, n (%) | ||
15 | 495 (67) | 278 (73) |
14 | 86 (12) | 57 (15) |
13 | 9 (1) | 5 (1) |
Missingb | 142 (19) | 39 (10) |
LOC, yes (%) | unknown | 175 (46) |
PTA | unknown | 379 (100) |
< 1 h (%) | 272 (72) | |
1–24 h (%) | 107 (28) | |
Other injuries, yes (%) | unknown | 133 (35) |
Level of care, n (%) | ||
Discharged home from ED | 517 (71) | 261 (69) |
Observation < 24 h | 89 (12) | 61 (16) |
Neurosurgical admission | 69 (9) | 39 (10) |
Another admission | 50 (7) | 18 (5) |
Missing | 7 (1) | – |