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. 2017 Jun 27;12(6):e0179088. doi: 10.1371/journal.pone.0179088

Table 1. Descriptive characteristics of the study population.

SLE patients, n (%) Controls, n (%) P-value
Total 17,495 52,485
Age group, years 0.980
    0–19 1,149 (6.5) 3,425 (6.5)
    20–39 7,780 (44.5) 23,265 (44.3)
    40–59 7,029 (40.2) 21,203 (40.4)
    ≥60 1,537 (8.8) 4,592 (8.8)
Sex 0.999
    Male 1,669 (9.5) 5,007 (9.5)
    Female 15,826 (90.5) 47,478 (90.5)
Insurance type <0.001
    Health insurance 16,284 (93.1) 51,930 (98.9)
    Medical aid 1,211(6.9) 555 (1.1)

SLE, systemic lupus erythematosus.