Risk Factors for Chronic Subdural Hematoma after a Minor Head Injury in the Elderly: A Population-Based Study

Table 4

Cox regression for subdural hematoma among patients with minor head injury and controls, by age group.

Variables	Age ≤ 75			Age > 75
	HR	95% CI	value	HR	95% CI	value
Gender
Female	1.00			1.00
Male	1.66	1.20–2.31	0.002	2.25	1.66–3.05	<0.001
Comorbidity
DM	1.24	0.88–1.75	0.221	1.13	0.83–1.55	0.438
Hypertension	0.94	0.65–1.35	0.741	0.88	0.63–1.25	0.476
Chronic kidney disease	0.78	0.39–1.55	0.484	0.51	0.27–0.98	0.042
Chronic liver disease	0.79	0.54–1.16	0.230	0.73	0.49–1.09	0.121
Rheumatic heart disease	1.24	0.45–3.42	0.682	0.92	0.40–2.09	0.839
Ischemic heart disease	0.57	0.39–0.83	0.004	1.21	0.89–1.65	0.224
Af/AF	0.72	0.26–1.98	0.519	0.66	0.32–1.37	0.267
Heart failure	0.94	0.55–1.61	0.815	0.81	0.55–1.19	0.289
Deep vein thrombosis	0.63	0.16–2.56	0.523	0.91	0.34–2.46	0.852
Hydrocephalus	2.04	0.65–6.43	0.223	2.76	1.41–5.41	0.003