Table 3.

Multivariate regression model depicting variables significantly associated with having an abnormal brain CT

Term	Estimate	Std Error	Chi-Square	P-value	Lower 95%	Upper 95%	Odds ratio	Lower 95%	Upper 95%	Reci-procal
Age	0.0385	0.0023	272.99	< 0.0001	0.0339	0.0430	1.0392	1.0345	1.0440	0.9622
Sex	0.4749	0.1033	21.14	< 0.0001	0.2725	0.6774	1.6079	1.3132	1.9688	0.6219
Associated vomiting	0.6406	0.1966	10.62	0.0011	0.2553	1.0259	1.8975	1.2908	2.7895	0.5270
Associated seizure	0.5202	0.3282	2.51	0.1130	-0.1232	1.1635	1.6823	0.8841	3.2010	0.5944
Loss of consciousness	0.1575	0.0771	4.17	0.0411	0.0064	0.3086	1.1706	1.0064	1.3616	0.8543
Alteration of consciousness	0.2143	0.0834	6.60	0.0102	0.0509	0.3778	1.2390	1.0522	1.4591	0.8071
Post Traumatic Amnesia	0.0847	0.0852	0.99	0.3203	-0.0824	0.2518	1.0884	0.9209	1.2863	0.9188
GCS score in the ED	-0.6211	0.1047	35.17	< 0.0001	-0.8264	-0.4159	0.5373	0.4376	0.6598	1.8611