Healthcare Utilization and Costs of Systemic Lupus Erythematosus in Medicaid

Table 2

Annualized healthcare utilization in the followup period for SLE patients and their matched controls.

	SLE patients		Non-SLE patients		Difference	P value
	N = 14,262		N = 14,262
Number of patients with at least 1 inpatient admission during the entire followup (N, %)	8,459	59.3%	5,644	39.6%	20%	<0.001
Among those with at least 1 IP admission, number of inpatient admissions (mean, SD)	1.2	1.6	1.0	1.3	0.2	<0.001
Number of inpatient admissions among all patients (mean, SD)	0.7	1.3	0.4	1.0	0.3	<0.001
Number of patients with at least 1 ER visit during the entire followup (N, %)	11,202	78.5%	9,494	67.5%	11%	<0.001
Among those with at least 1 ER visit, number of ER visits (mean, SD)	2.6	4.7	2.1	3.5	0.6	<0.001
Number of ER visits among all patients (mean, SD)	2.1	4.3	1.4	2.9	0.7	<0.001
Number of physician office visits (mean, SD)	9.8	8.2	6.4	7.0	3.4	<0.001
Number of outpatient hospital visits (mean, SD)	3.3	5.8	2.2	5.0	1.1	<0.001
Number of other outpatient services (mean, SD)	69.7	86.8	56.8	89.8	12.9	<0.001

N: number, IP: inpatient admission, ER: emergency room.