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Table 1 Characteristics of patients with systemic lupus erythematosus

From: Anti-C1q antibodies antedate patent active glomerulonephritis in patients with systemic lupus erythematosus

  Active lupus with nephritis (n = 15) Active lupus without nephritis (n = 33) Inactive lupus without nephritis (n = 22)
Female/male 15/0 (100%) 28/5 (84.8%) 21/1 (95.5%)
Ethnicity
   Caucasian 13 (86.7%) 20 (60.6%) 19 (86.4%)
   Black 2 9 3
   Asian 0 4 0
Age at serum sampling (years)
   Median 30 28 35
   Range 19 to 58 17 to 48 20 to 76
Duration of SLE (years) at serum sampling
   Median 6 2.1 10
   Range 0.25 to 36 0.1 to 14.1 1.1 to 49
Duration of follow-up (years) (from SLE diagnosis to last visit)
   Median 13.5 13 19
   Range 5.9 to 23 2 to 17 4 to 52
SLEDAI at first serum sampling (points)
   Median 10a 8 0
   Range 4–22 4–30 0 to 3
  1. SLE, systemic lupus erythematosus. aSystemic Lupus Erythematosus Disease Activity Index (SLEDAI) was calculated before the onset of renal manifestations.
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