Table 1.
Socioeconomic-demographic features as a function of the presence of discoid lupus.
| Feature | SLE with discoid lupus n=393 | SLE without discoid lupus n=1835 | p value |
|---|---|---|---|
| Ethnicity, % | |||
| African American (n=793) | 227 (28.6) | 566 (71.4) | <0.001 |
| Caucasian (n=966) | 122 (12.6) | 844 (87.4) | |
| Hispanic | |||
| Puerto Rico (n=220) | 24 (10.9) | 196 (89.1) | |
| Texas (n=209) | 13 (6.2) | 196 (93.8) | |
| Other (n=40) | 7 (17.5) | 33 (82.5) | |
| Age at diagnosis, mean (SD) years | 34.5 (12.4) | 34.3 (12.9) | 0.829 |
| Disease duration, mean (SD) years | 9.4 (6.9) | 7.6 (5.8) | <0.001 |
| Gender, n (%) female | 362 (92.1) | 1682 (91.7) | 0.793 |
| Years of education, mean (SD) years | 13.2 (3.0) | 13.8 (3.0) | <0.001 |
| Health insurance (n=1580), n (%) having it | 235/257 (91.4) | 1189/1323 (89.9) | 0.459 |
| Currently smoking, n (%) | 91 (23.2) | 251 (13.7) | <0.001 |
SLE: systemic lupus erythematosus; SD: standard deviation