Table 2. Characteristics of the hospitals treating patients with aneurysmal subarachnoid hemorrhage via surgical clipping or endovascular coiling, by insurance status.

	Private	Medicare		Medicaid		Uninsured		F
			p *		p *		p *
Teaching hospital (%)	59	60	0.5920	67	0.0065	66	0.0199	0.0131
Rural location (%)	3.3	3.0	0.7950	1.8	0.1464	2.7	0.6146	0.5340
Hospital region (%)			0.9994		0.6112		0.6298	0.8517
Northeast	17	17		16		15
Midwest	22	22		22		23
South	36	37		36		43
West	24	24		26		18
Annual Aneurysm ProcedureVolume (median+range)+	27(0.14–134)	30.5(0.14–134)	0.0075	25.8(0.25–134)	0.2128	25.8(0.25–134)	0.7574
Time to Aneurysm Repair, days(median+range)+	1 (0–69)	1 (0–50)	<0.0001	1 (0–106)	<0.0001	1 (0–40)	0.1138	<0.001
Time to Ventriculostomy, days(median+range)+	0 (0–52)	0 (0–62)	0.2955	0 (0–77)	0.4034	0 (0–42)	0.6828	0.209

^*P values are for comparison with private insurance.

⁺For non-normal distributions, Wilcoxon rank sum and Kruskal-Wallis test are used for nonparametric alternative to two-sample t-test and ANOVA respectively.