Table 3.

Relative risk ratios for the clinical variables for traumatic intracranial hemorrhage (tICH) (bivariate analysis)

Clinical variable	tICH present n/N (%)	tICH absent n/N (%)	Relative risk (95% CI)
Age 65 years and older	50/60 (83.3)	750/922 (81.3)	1.14 (0.59–2.20)
Warfarin use	31/60 (51.7)	683/922 (74.1)	0.40 (0.25–0.65
Clopidogrel use	30/60 (50.0)	249/922 (27.0)	2.52 (1.55–4.10)
Concomitant aspirin use	4/60 (6.7)	41/922 (4.4)	1.49 (0.56–3.92)
Non-ground level fall mechanism	10/60 (16.7)	151/922 (16.4)	1.02 (0.53–1.97)
Headache	30/60 (50.0)	319/922 (34.6)	1.81 (1.11–2.96)
Vomiting	8/60 (13.3)	33/922 (3.6)	3.53 (1.80–6.94)
Loss of consciousness or amnesia	15/60 (25.0)	172/922 (18.7)	1.42 (0.81–2.49)
Drug or alcohol intoxication	4/60 (6.7)	30/922 (3.3)	1.99 (0.77–5.18)
Trauma above the clavicles	41/60 (68.3)	655/922 (71.0)	0.89 (0.52–1.50)
Abnormal mental status	15/60 (25.0)	88/922 (9.5)	2.85 (1.65–4.92)