Table 1

Baseline demographic characteristics of patients with SLE and control subjects

Population demographicsTotal patients (N=344)Total controls (N=319)p Value*
Female gender95%93%NS
Age in years, mean (SD)(N=330)(N=303)
 18–3435%34%NS
 35–4931%33%NS
 50–6431%25%NS
 65+2%8%<0.05
Race/ethnicity(N=344)(N=321)
 African–American45%31%<0.01
 Caucasian36%45%<0.05
 Hispanic11%9%NS
 Asian/Pacific Island7%11%NS
 Other7%6%NS
Marital Status(N=341)(N=318)
 Married/cohabitating37%50%<0.01
 Never married45%35%<0.01
 Separated/divorced16%12%NS
 Widowed2%3%NS
#Adults in household(N=344)(N=321)
 Average (mean)2.1 (SD 1)2.1 (SD 1.4)NS
#Children in household(N=340)(N=314)
 Average (mean)0.7 (SD 1)0.8 (SD 1.2)NS
Education(N=331)(N=309)
 HS graduation or less25%21%NS
 Some college41%33%<0.05
 4 year college17%25%<0.05
 >4 year college17%21%NS
Income (US dollars/year)(N=324)(N=295)
 ≤34 99951%36%<0.01
 35 000–74 99925%26%NS
 ≥75 00024%38%<0.01
  • *NS=p value exceeds 0.05.

  • HS, high school; SLE, systemic lupus erythematous.