Cytokine and autoantibody clusters interaction in systemic lupus erythematosus

Table 1 General characteristics of 67 women with SLE

Age (IQR), years	50 (38–57)
Age at onset disease (IQR), years	29 (22–40)
Disease duration (IQR), years	13 (9–21)
Polyautoimmunity^a (%)	14 (21)
Educational level (%)
< 9 years	10 (15)
≥ 9 years	57 (85)
Socioeconomic status^b (%)
Low	19 (28)
Intermediate	37 (55)
High	11 (17)
1997 ACR Criteria at diagnosis (%)
Positive ANAs	58 (87)
Immunologic criteria	54 (81)
Hematologic criteria	48 (72)
Non-erosive arthritis	47 (70)
Photosensitivity	41 (61)
Malar rash	33 (49)
Renal criteria^c	25 (37)
Oral ulcers	23 (34)
Serositis	19 (28)
Neurologic criteria	12 (18)
Discoid rash	7 (10)

ACR American College of Rheumatology
^aPolyautoimmunity signifies the presence of more than one autoimmune disease in a single patient
^bSocioeconomic status was categorized based on Colombian legislation as previously reported [23, 24]
^cRenal criteria was defined as active urinary sediment, or proteinuria > 500 mg/24 h or positive renal biopsy [23, 24]

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