Table 2.

Patient characteristics post-matching

Characteristic	SLE cohort	Non-SLE cohort-matched controls
	N = 6707	N = 13,414
Disability benefits, %	49.9	49.9
Mean age, years	61	61
Female, %	86.0	86.0
Race, %
White	73.1	73.1
Black	20.3	20.3
Other	6.6	6.6
Region, %
Northeast	16.4	16.4
Midwest	19.5	19.5
South	45.5	45.5
West	16.9	16.9
Other	1.7	1.7
Index year, %
2003	81.1	79.6
2004	7.6	7.5
2005	6.1	6.3
2006	5.2	6.7

No significant differences between groups.