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Table 1 Baseline characteristics of individuals with incident and prevalent systemic lupus erythematosus (SLE) and their matched general population comparators

From: New-onset non-infectious pulmonary manifestations among patients with systemic lupus erythematosus in Sweden

  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