Table 2.

Baseline characteristics of the study subjects.

Variables	Subdural hematoma		No subdural hematoma		P value
	n = 347	%	n = 27705	%
Gender					<0.001
Female	119	34.3	13927	50.3
Male	228	65.7	13778	49.7
Age					<0.001
≤75	154	44.4	14,826	53.5
>75	193	55.6	12,879	46.5
Comorbidity
DM	120	34.6	9,450	34.1	0.854
Hypertension	245	70.6	20,157	72.8	0.371
Chronic kidney disease	19	5.5	2,315	8.4	0.054
Chronic liver disease	64	18.4	6,455	23.3	0.033
Rheumatic heart disease	10	2.9	859	3.1	0.815
Ischemic heart disease	141	40.6	12,077	43.6	0.270
Af/AF	12	3.5	1,413	5.1	0.166
Heart failure	4,831	1,392.2	52	0.2	0.231
Peripheral artery occlusion	127	36.6	0	0.0	0.413
Deep vein thrombosis	6	1.7	614	2.2	0.540
Hydrocephalus	12	3.5	277	1.0	<0.001
Minor head injury	254	73.2	13,772	49.7	<0.001