Demographic, past health, and injury related data for TBI only group (n=394)
| Participants (n=130) | Refusals (n=264) | Statistic [df] | p Value | |
|---|---|---|---|---|
| *Mann-Whitney U test. | ||||
| Demographic data | ||||
| Mean (SD) age (y) | 33.6 (12.7) | 32.4 (11.9) | t[392]=0.89 | 0.375 |
| Sex (% men) | 65.4 | 62.5 | χ2[1]=0.31 | 0.576 |
| Marital status (% married) | 37.2 | 40.0 | χ2[1]=0.21 | 0.648 |
| Employment (% employed) | 83.8 | 91.1 | χ2[1]=2.94 | 0.085 |
| History of major medical illness (% positive) | 43.8 | 49.0 | χ2[1]=0.80 | 0.371 |
| Injury data | ||||
| Mechanism of injury (% MVA verses other causes) | 36.2 | 27.9 | χ2[1]=2.81 | 0.094 |
| Admission to hospital (% yes) | 22.3 | 7.2 | χ2[1]=18.6 | <0.000 |
| TBI data | ||||
| Loss of consciousness, | ||||
| % altered level only | 57.5 | 75.1 | χ2[2]=10.8 | <0.000 |
| % definite LOC | 42.5 | 24.9 | ||
| Glasgow Coma Score, median (range) | 15.0 (2.0) | 15.0 (2.0) | 12541.5* | 0.411 |
| GCS score, | ||||
| % 13.0 | 0.9 | 2.1 | χ2[2]=2.31 | 0.315 |
| % 14.0 | 12.6 | 8.2 | ||
| % 15.0 | 86.5 | 89.7 | ||
| PTA duration, | ||||
| % <1 hour | 81.3 | 95.2 | χ2[1]=14.5 | <0.000 |
| % ≥1 hour | 18.8 | 4.8 | ||
| Brain CT scan (% positive) | 33.3 | 5.7 | χ2[1]=13.7 | <0.000 |