Table 1.
Sociodemographic Features of SLE patients with and without Discoid Lupus.
| Feature | SLE without Discoid Lupus n=926 (90%) |
SLE with Discoid Lupus n=117 (10%) |
p-value* |
|---|---|---|---|
| Female (%) | 847 (92) | 111 (95) | 0.28 |
| Race/Ethnicity (%) | |||
| Caucasian | 480 (52) | 56 (48) | 0.02 |
| African American | 130 (14) | 31 (27) | |
| Hispanic | 41 (4) | 6 (5) | |
| Asian | 83 (9) | 8 (7) | |
| Other | 10 (1) | 1 (1) | |
| Missing race/ethnicity | 182 (19) | 15 (12) | 0.09 |
| Age at Diagnosis in Years, mean (SD) | 32.6 (13.5) | 32.0 (12.6) | 0.91 |
| SLE Duration in Years, mean (SD) | 18.4 (10.6) | 18.4 (10.5) | 0.90 |
| Number of ACR criteria for SLE, mean (SD) | 5.2 (1.2) | 5.6 (1.4) | <0.01 |
| Medications | n (%) | n (%) | |
| Hydroxychloroquine | 739 (80) | 103 (88) | 0.05 |
| Mycophenylate | 178 (20) | 24 (20) | 0.71 |
| Corticosteroids (systemic) | 693 (75) | 88 (75) | 1.00 |
| Methotrexate | 101 (11) | 18 (15) | 0.16 |
| Cyclophosphamide | 101 (11) | 15 (13) | 0.53 |
| Azathioprine | 204 (22) | 30 (26) | 0.41 |
| Rituximab | 26 (3) | 1 (1) | 0.35 |
| Leflunomide | 22 (2) | 2 (2) | 1.00 |
*
Fisher’s exact tests for categorical variables (race/ethnicity). Wilcoxon rank sum tests for continuous variables and chi-square tests for medications.