Demographics of early onset (< 50 years) vs late onset (≥ 50 years) SLE.
| Characteristic | Early Onset | Late Onset | p |
|---|---|---|---|
| N (%) | 1367 (89.4) | 161 (10.5) | |
| Female: male | 8.83:1 | 7.47:1 | 0.5 |
| Mean current age, yrs | 41.64 ± 15.01 | 67.09 ± 8.42 | |
| Mean age at diagnosis, yrs | 26.71 ± 11.36 | 57.90 ± 7.01 | |
| Mean disease duration, yrs | 15.02 ± 10.48 | 9.3 ± 6.1 | < 0.001 |
| Caucasian (%) | 760 (55.6) | 120 (74.5) | |
| Asian (%) | 249 (18.2) | 5 (3.1) | |
| Black (%) | 122 (8.9) | 8 (5.0) | |
| Aboriginal (%) | 71 (5.2) | 5 (3.1) | |
| Latin/Hispanic (%) | 22 (1.6) | 2 (1.2) | |
| Jewish (%) | 22 (1.6) | 4 (2.5) | |
| Middle Eastern (%) | 21 (1.5) | 3 (1.9) |