The epidemiology, risk factors, and impact on hospital mortality of status epilepticus after subdural hematoma in the United States

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Table 2 Demographic characteristics of the study cohort

Variable	No status epilepticus	Percentage	With status epilepticus	Percentage
Number of SDH patients	1575834	99.50%	7421	0.5
1° SDH/2° SDH	1130031 / 445803	71.7%/ 28.3%	4337 / 3084	58.4%/ 41.6%
Age [Mean + SD]	69.64 + 18.07		65.53 + 17.1
Female/Male	646092 / 929742	41%/ 59%	2930 / 4491	39.5% / 60.5%
Race*
White	884516	56.10%	3760	50.70%
Black	127327	8.10%	1147	15.50%
Hispanic	95653	6.10%	581	7.80%
Asian	39711	2.50%	141	1.90%
Native American	6303	0.40%	59	0.80%
Other	30256	1.90%	159	2.10%
Not stated	391910	24.90%	1573	21.20%
Hospital characteristics*
Rural	111254	7%	323	4.30%
Urban private	913669	58%	4405	59.40%
Urban academic	550912	35%	2693	36.30%
Northeast	307918	19.50%	1479	19.90%
Midwest	352829	22.40%	1523	20.50%
South	586368	37.20%	2758	37.20%
West	328561	20.90%	1660	22.40%
Small to medium (<300 beds)	111096	7%	470	6.40%
Large (300–500 beds)	330295	21%	1633	22.00%
Extra-large (>500 beds)	1134285	72%	5317	71.60%
Major organ dysfunction
Respiratory	133631	8.50%	2701	36.40%
Hematological	92659	5.90%	804	10.80%
Hepatic	11188	0.70%	185	2.50%
Neurological	107472	6.80%	1492	20.10%
Metabolic	26632	1.69%	498	6.71%
Renal	137728	8.74%	1322	17.82%
Cardiovascular	55154	3.50%	555	7.48%
Outcome
In hospital mortality	210531	13.40%	1937	26.10%