Table 1A.
Demographic and clinical variables by age-group and sex
| Variable | Overall (N=100) |
18–29 years (N=70) |
30–39 years (N=30) |
Sig. (p) | Variable | Male (N=71) |
Female (N=29) |
Sig. (p) |
|---|---|---|---|---|---|---|---|---|
| Sex | 0.736 | Age Group | 0.736 | |||||
| Male | 71 (71.0%) | 49 (70.0%) | 22 (73.3%) | 18–9 years | 49 (69.0%) | 21 (72.4%) | ||
| Female | 29 (29.0%) | 21 (30.0%) | 8 (26.7%) | 30–39 years | 22 (31.0%) | 8 (27.6%) | ||
| Education | 0.182 | Education | 0.029 | |||||
| Years (mean, SD) | 14.3 (2.5) | 14.1 (2.1) | 14.8 (3.2) | Years (mean, SD) | 13.9 (2.3) | 15.1 (2.8) | ||
| Race | 0.129 | Race | 0.999 | |||||
| Caucasian | 72 (72.0%) | 46 (65.7%) | 26 (86.7%) | Caucasian | 51 (71.8%) | 21 (72.4%) | ||
| African-American/African | 9 (9.0%) | 8 (11.4%) | 1 (3.3%) | African-American/African | 6 (8.5%) | 3 (10.3%) | ||
| Other Races | 19 (19.0%) | 16 (22.9%) | 3 (10.0%) | Other Races | 14 (19.7%) | 5 (17.2%) | ||
| Psychiatric History | 0.819 | Psychiatric History | 0.188 | |||||
| No | 65 (65.0%) | 45 (64.3%) | 20 (66.7%) | No | 49 (69.0%) | 20 (55.2%) | ||
| Yes | 35 (35.0%) | 25 (35.7%) | 10 (33.3%) | Yes | 22 (31.0%) | 13 (44.8%) | ||
| Mechanism of Injury | 0.311 | Mechanism of Injury | 0.089 | |||||
| MVA/MCC | 22 (22.0%) | 12 (17.2%) | 10 (33.4%) | MVA/MCC | 18 (25.3%) | 4 (13.8%) | ||
| PVA | 14 (14.0%) | 11 (15.7%) | 3 (10.0%) | VA | 7 (9.9%) | 7 (24.1%) | ||
| Fall | 41 (41.0%) | 29 (41.4%) | 12 (40.0%) | Fall | 27 (38.0%) | 14 (48.4%) | ||
| Assault | 21 (21.0%) | 17 (24.3%) | 4 (13.3%) | Assault | 18 (25.4%) | 3 (10.3%) | ||
| Other | 2 (2.0%) | 1 (1.4%) | 1 (3.3%) | Other | 1 (1.4%) | 1 (3.4%) | ||
| Non-Assault | 85 (80.2%) | 53 (75.7%) | 26 (86.7%) | 0.288 | Non-Assault | 53 (74.6%) | 26 (89.7%) | 0.112 |
| Assault | 21 (19.8%) | 17 (24.3%) | 4 (13.3%) | Assault | 18 (25.4%) | 3 (10.3%) | ||
| Loss of Consciousness | 0.614 | Loss of Consciousness | 0.310 | |||||
| None | 24 (24.0%) | 18 (25.7%) | 6 (20.0%) | None | 15 (21.1%) | 9 (31.0%) | ||
| <0.5 hrs | 45 (45.0%) | 29 (41.4%) | 16 (53.3%) | <0.5 hrs | 31 (43.7%) | 14 (48.3%) | ||
| Unknown | 31 (31.0%) | 23 (32.9%) | 8 (26.7%) | Unknown | 25 (35.2%) | 6 (20.7%) | ||
| ED GCS | 0.811 | ED GCS | 0.409 | |||||
| 13 | 3 (3.0%) | 3 (4.3%) | 0 (0.0%) | 0.999* | 13 | 2 (2.8%) | 1 (3.4%) | 0.289* |
| 14 | 19 (19.0%) | 13 (18.6%) | 6 (20.0%) | (<15 vs. =15) | 14 | 16 (22.5%) | 3 (10.3%) | (<15 vs. =15) |
| 15 | 78 (78.0%) | 54 (77.1%) | 24 (80.0%) | 15 | 53 (74.6%) | 25 (86.2%) | ||
| Marshall Score | 0.701 | Marshall Score | 0.213 | |||||
| 1 | 77 (77.0%) | 53 (75.7%) | 24 (80.0%) | 1 | 51 (71.8%) | 26 (89.7%) | ||
| 2 | 18 (18.0%) | 12 (17.1%) | 6 (20.0%) | 2 | 16 (22.5%) | 2 (6.9%) | ||
| 3 | 4 (4.0%) | 4 (5.7%) | 0 (0.0%) | 3 | 3 (4.2%) | 1 (3.4%) | ||
| 4 | 1 (1.0%) | 1 (1.4%) | 0 (0.0%) | 4 | 1 (1.4%) | 0 (0.0%) | ||
| CT Intracranial Lesion | 0.641 | CT Intracranial Lesion | 0.055 | |||||
| No | 77 (77.0%) | 53 (75.7%) | 24 (80.0%) | No | 51 (71.8%) | 26 (89.7%) | ||
| Yes | 23 (23.0%) | 17 (24.3%) | 6 (20.0%) | Yes | 20 (28.2%) | 3 (10.3%) | ||
| Polytrauma | 0.749 | Polytrauma | 0.336 | |||||
| No | 87 (87.0%) | 60 (85.7%) | 27 (90.0%) | No | 60 (84.5%) | 27 (93.1%) | ||
| Yes | 13 (13.0%) | 10 (14.3%) | 3 (10.0%) | Yes | 11 (15.5%) | 2 (6.9%) |
CT = computed tomography; ED = emergency department; GCS = Glasgow Coma Scale; LOC = loss of consciousness; MCC = motorcycle crash; MVA = motor vehicle accident; PVA = pedestrian vs. auto; SD = standard deviation