Table 1.
Baseline characteristics of individuals with incident and prevalent systemic lupus erythematosus (SLE) and their matched general population comparators
| Incident SLE | Prevalent SLE | |||
|---|---|---|---|---|
| SLE | General population | SLE | General population | |
| Subjects, n | 3209 | 17,658 | 6908 | 37,046 |
| Age at inclusion, mean (SD) | 47 (19.1) | 47 (18.6) | 50 (18.1) | 49 (17.7) |
| Female, % | 85.7 | 84.7 | 86.8 | 85.9 |
| Country of birth, % | ||||
| Nordic | 84.8 | 89.6 | 89.1 | 91.1 |
| Non-Nordic | 15.2 | 10.3 | 10.8 | 8.9 |
| Missing | < 1 | < 1 | < 1 | < 1 |
| Years of education, % | ||||
| ≤ 9 | 27.8 | 24.0 | 30.4 | 26.8 |
| 10–12 | 40.0 | 41.1 | 41.0 | 42.1 |
| ≥ 13 | 27.1 | 30.1 | 24.9 | 27.3 |
| Missing | 5.1 | 4.7 | 3.7 | 3.9 |