Demographics of total study and BIG groups
| Total study n=269 | BIG 1 n=98 | BIG 2 n=171 | |
| Age (years) | 53.0 (31.0 to 67.1) | 53.0 (29.0 to 66.0) | 52.4 (31.0 to 68.0) |
| Female | 120 (44.6%) | 50 (51.0%) | 70 (40.9%) |
| ISS | 10 (8 to 16) | 10 (5 to 16) | 10 (8 to 17) |
| Admission GCS | 15 (15 to 15) | 15 (15 to 15) | 15 (15 to 15) |
| Discharge GCS | 15 (15 to 15) | 15 (15 to 15) | 15 (15 to 15) |
| NSG Consult | 258 (95.9%) | 94 (95.9%) | 164 (95.9%) |
| SDH | 138 (51.3%) | 51 (52.0%) | 87 (50.9%) |
| SAH | 140 (52.0%) | 45 (45.9%) | 95 (55.7%) |
| EDH | 7 (2.6%) | 0 (0%) | 7 (4.1%) |
| IPH | 47 (17.5%) | 13 (13.3%) | 34 (19.9%) |
| Combined injuries | 53 (19.7%) | 10 (10.2%) | 43 (25.2%) |
| Skull fracture | 58 (21.6%) | 0 (0%) | 58 (33.9%) |
| ICU LOS (days) | 1 (0 to 2) | 1 (0 to 2) | 1 (0 to 2) |
| LOS (days) | 2 (2 to 4) | 2 (1 to 4) | 3 (2 to 4) |
Continuous variables presented as median (IQR) and categorical variables presented as number (percentage).
BIG, Brain Injury Guidelines; EDH, epidural hematoma; GCS, Glasgow Coma Scale score; ICU, intensive care unit; IPH, intraparenchymal hematoma; ISS, Injury Severity Score; LOS, length of stay; NSG, neurosurgery; SAH, subarachnoid hemorrhage; SDH, subdural hematoma.