Table 1 Cohort characteristics
Head CT performed (n = 2548) | NO head CT performed (n = 238) | P-value (z test for proportions) | |
|---|---|---|---|
Sex | 0.59 | 0.42 | P < 0.00001 |
Median age | 40 years | 27 years | |
Fall mechanism | 0.51 | 0.37 | P < 0.00001 |
MVC mechanism | 0.33 | 0.36 | NS |
LOC | 0.49 | 0.03 | P < 0.00001 |
AOC | 0.31 | 0.12 | P < 0.00001 |
Associated seizure | 0.02 | 0.01 | NS |
Associated vomiting | 0.06 | 0.03 | NS |
PTA | 0.29 | 0.07 | P < 0.00001 |
ED GCS 13 | 0.03 | 0 | P = 0.0067 |
ED GCS 14 | 0.11 | 0.02 | P < 0.00001 |
ED GCS 15 | 0.86 | 0.98 | P < 0.00001 |