Table 1

GLADEL patients included in the case-crossover design (n=251)

Characteristics
Age at diagnosis, years, mean (SD)27.9 (11.1)
Gender, female, n (%)213 (84.9)
Socioeconomic status, n (%)
 High19 (7.6)
 Medium50 (19.9)
 Low182 (72.5)
Racial/ethnic group, n (%)
 Mestizo118 (47.0)
 Caucasian96 (38.2)
 African–Latin American30 (12.0)
 Other7 (2.8)
Years of education, mean (SD)9.7 (4.2)
Baseline SLEDAI, mean (SD)13.6 (8.1)
Baseline SDI, mean (SD)1.3 (1.3)
Calendar time, n (%)
 1994–1998198 (21.1)
 1999–200253 (78.9)
  • SDI, SLICC/ACR damage index; SLEDAI, Systemic Lupus Erythematosus Disease Activity Index.