Table 1.
Demographic and clinical characteristics of the four study groups: systemic lupus erythematosus (SLE), incomplete lupus (ILE), first-degree relatives (FDR), non-autoimmune controls (NC).
| SLE | ILE | FDR | NC | |
|---|---|---|---|---|
| Number | 33 | 23 | 20 | 17 |
| % Female | 90 | 94 | 84 | 91 |
| % AA | 43 | 16 | 16 | 27 |
| % Hispanic | 24 | 19 | 11 | 18 |
| Age (years) | 38·6 ± 2·9* | 46·9 ± 3·2 | 46·6 ± 4·4 | 38·9 ± 5·3 |
| SLE criteria | 5·0 ± 0·3 | 2·1 ± 0·2 | – | – |
| ANA (EU)** | 118 ± 11 | 103 ± 18 | 37 ± 11 | 16 ± 4 |
| DNA (EU) | 317 ± 99 | 156 ± 44 | 132 ± 46 | n.d. |
*
Values for age, criteria and antibodies are expressed as mean ± s.e.m.
**
Anti-nuclear antibodies (ANA) and DNA values are expressed as enzyme-linked immunosorbent assay (ELISA) units (EU). n.d. indicates that testing for anti-DNA was not done.