Table 1.
Association of CT with selected variables
| CT | χ2 | p-value | ||||
|---|---|---|---|---|---|---|
| No | Yes | |||||
| Count | Percent | Count | Percent | |||
| Dangerous mechanism of injury | ||||||
| No | 65 | 44.8 | 80 | 55.2 | 0.8 | 0.370 |
| Yes | 22 | 37.9 | 36 | 62.1 | ||
| Number of episodes of vomiting | ||||||
| No | 76 | 43.9 | 97 | 56.1 | 0.55 | 0.458 |
| Yes | 11 | 36.7 | 19 | 63.3 | ||
| History of retrograde amnesia | ||||||
| No | 85 | 47.0 | 96 | 53.0 | 11.49 | p < 0.01 |
| Yes | 2 | 9.1 | 20 | 90.9 | ||
| ENT bleed | ||||||
| No | 81 | 56.3 | 63 | 43.8 | 36.29 | p < 0.01 |
| Yes | 6 | 10.2 | 53 | 89.8 | ||
| Hemotympanum | ||||||
| No | 87 | 44.8 | 107 | 55.2 | 7.06** | 0.008 |
| Yes | 0 | 0.0 | 9 | 100.0 | ||
| Raccoon eyes | ||||||
| No | 78 | 45.1 | 95 | 54.9 | 2.38 | 0.123 |
| Yes | 9 | 30.0 | 21 | 70.0 | ||
| Cerebrospinal fluid leakage from ear or nose | ||||||
| No | 87 | 42.9 | 116 | 57.1 | – | – |
| Yes | 0 | 0.0 | 0 | 0.0 | ||
| Battle's sign | ||||||
| No | 87 | 43.1 | 115 | 56.9 | 0.75 | 0.385 |
| Yes | 0 | 0.0 | 1 | 100.0 | ||
| Depressed skull fracture | ||||||
| No | 87 | 43.5 | 113 | 56.5 | 2.28 | 0.131 |
| Yes | 0 | 0.0 | 3 | 100.0 | ||
| Neurological clinical features | ||||||
| No | 59 | 48.0 | 64 | 52.0 | 3.33 | 0.068 |
| Yes | 28 | 35.0 | 52 | 65.0 | ||
**Significant at 0.01 level