Table 1.

Patient characteristics pre-matching

	Medicare disabled age <65 years		Medicare age ≥65 years
Characteristics	SLE cohort	Non-SLE cohort	SLE cohort	Non-SLE cohort
	N = 5,555	N = 455,950	N = 7,793	N = 2,250,012
Mean age, years	49	50	74	74
Female, %	87*	46*	83**	57**
Race, %
White	62.6*	73.3*	84.3	85.5
Black	28.3*	18.4*	10.1	8.2
Other	9.2	8.3	4.4	6.3
Region, %
Northeast	15.9*	18.4*	19.2	19.9
Midwest	18.9*	21.4*	19.7**	23.0**
South	46.3*	39.9*	42.3**	35.0**
West	16.8*	17.6*	17.7**	20.1**
Other	2.1	2.8	1.2	2.1

*P < 0.05 between Medicare Disabled age <65 cohorts.

**P < 0.05 between Medicare age ≥65 cohorts.