Table 1.

Demographic and disease characteristics of study participants^*

	Value
Demographic characteristics
Age, mean ± SD years	48.2 ± 12.8
Female sex	92.6
White	74.0
Married or living with a partner	58.4
Education
Less than high school	2.6
High school	11.7
Some college	26.3
Associate’s degree/trade or vocational school	20.7
College graduate	22.7
Postgraduate	16.0
Employed†	44.5
Disease characteristics
Age at diagnosis, mean ± SD years	34.5 ± 13.3
Disease duration, mean ± SD years	13.7 ± 8.5
Disease activity, mean ± SD SLAQ score‡	12.4 ± 8.0
Disease activity, SLAQ score quartiles‡
<6	22.5
6–11	27.5
12–16	21.7
≥17	28.3
SLE flare in past 3 months	47.4
Selected organ manifestations
Renal	21.0
On dialysis	2.6
Pulmonary	20.7
Pericarditis	5.1
Seizures	3.5
SF-12, mean ± SD score
MCS	47.5 ± 12.9
PCS	37.3 ± 6.5

^*Values are the percentage unless otherwise indicated. SLAQ = Systemic Lupus Activity Questionnaire; SLE = systemic lupus erythematosus; SF-12 = Medical Outcomes Study Short Form 12; MCS = mental component summary; PCS = physical component summary.

^†Had a job or did any work for pay or profit.

^‡Range 0–40.