Table 1.

Baseline Traits of SLE and Non-SLE Cohorts, 2007-2010

	SLE cohort n=47,709	Non-SLE comparator cohort n=190,836
Age at index date, years+	41.4 (12.3)	41.4 (12.3)
Female+	92.6	92.6
Median household income by zip code, US dollars	45,322 (16,931)	47,581 (17,278)
Race/ethnicity
White	34.7	46.4
African-American	42.5	22.1
Hispanic	16.1	24.4
Other*	6.8	7.2
Mean prednisone equivalent/day, mg
0	58.8	94.3
>0 to <7.5	28.6	5.3
≥7.5	12.6	0.4
Hydroxychloroquine use	35.7	0.2
Immunosuppressant use**	19.6	0.5
Bisphosphonate use	5.8	0.7
Charlson-Deyo Comorbidity Index	2.0 (1.5)	0.5 (1.3)
End-stage renal disease	5.4	0.6

Values presented as mean (SD) or %

⁺Cohorts were matched on age and sex

^*Asian, Native American, or Other

^**Azathioprine, mycophenolate, cyclophosphamide, cyclosporine, tacrolimus, leflunomide, methotrexate, or rituximab