Table 3. Model-based scoring system via multivariable logistic regression model for prediction of positive intracranial injuries from CT scan in patients with mild traumatic brain injuries.
| Predictors | OR | 95%CI | p-value | ß | Score |
|---|---|---|---|---|---|
| Presence of neurological deficits | 18.3 | 2.6,126.3 | 0.003 | 2.9 | 29 |
| Diffuse headache | 5.8 | 4.0,8.2 | <0.001 | 1.8 | 18 |
| Signs of skull base fracture | 4.8 | 2.8,8.5 | <0.001 | 1.6 | 16 |
| GCS <15 (at 2 hours) | 4.4 | 2.5,7.8 | <0.001 | 1.5 | 15 |
| Dangerous mechanisms | 4.1 | 1.7,10.0 | <0.001 | 1.4 | 14 |
| Stepping of the skull | 3.8 | 1.8,7.9 | <0.001 | 1.3 | 13 |
| Significant wound at the scalp | 2.7 | 1.9,4.0 | <0.001 | 1.0 | 10 |
| Vomiting >2 episodes | 2.0 | 1.2,3.3 | 0.013 | 0.7 | 7 |
| Current anticoagulant use | 1.6 | 0.5,5.5 | 0.451 | 0.5 | 5 |
| Posttraumatic amnesia | 1.3 | 0.9,1.9 | 0.237 | 0.2 | 2 |
| Age ≥60 years | 1.3 | 0.8,2.0 | 0.357 | 0.2 | 2 |
| Posttraumatic seizure | 1.1 | 0.5,2.2 | 0.902 | 0.1 | 1 |
| Loss of consciousness | 1.1 | 0.7,1.5 | 0.912 | 0.1 | 1 |
| Model Intercept | 0.03 | 0.02,0.05 | <0.001 | -3.48 | |
| Total score | 133 | ||||
| Mean±SE | Min | Max | |||
| Patients with positive CT findings | 32.8±1.0 | 0 | 62 | ||
| Patients with negative CT findings | 13.2±0.4 | 0 | 79 | ||
| Patients who required surgical intervention | 39.9±2.1 | 7 | 79 | ||
| Patients who did not require surgical intervention | 16.1±0.4 | 0 | 69 | ||
Abbreviations: OR, odds ratio; CI, confidence interval; ß, beta-coefficient; GCS, Glasgow Coma Scale; SE, standard error; Min, minimum; Max, maximum; CT, computed tomography.