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Table 1 Demographic, clinical, and laboratory baseline characteristics of the 75 anti-beta2 glycoprotein I (aβ2GPI) IgG-positive patients and 20 healthy subjects (children)

From: Anti-phospholipid IgG antibodies detected by line immunoassay differentiate patients with anti-phospholipid syndrome and other autoimmune diseases

  Primary thrombotic or obstetric APS (n = 34) SARD (n = 41) Healthy subjects (n = 20)
Sex, no. (%) female 31/34 (91%) 36/41 (88%) 9/20 (55%)
Autoimmune disease 34/34 (100%) 41/41 (100%) 0 (0%)
 Primary APS 34/34 (100%) 0 (0%) 0 (0%)
  SLE 0 (0%) 11/41 (27%) 0 (0%)
  SSj 0 (0%) 2/41 (5%) 0 (0%)
  SLE + SSj 0 (0%) 3/41 (7%) 0 (0%)
  DLE 0 (0%) 1/41 (2%) 0 (0%)
  PBC 0 (0%) 3/41 (7%) 0 (0%)
  SSc 0 (0%) 2/41 (5%) 0 (0%)
  DM/PM 0 (0%) 4/41 (10%) 0 (0%)
  UCTD 0 (0%) 15/41 (37%) 0 (0%)
 Thrombosis 19/34 (56%) 0 (0%) 0 (0%)
  Arterial 7/19 (37%) 0 (0%) 0 (0%)
  Venous 12/19 (63%) 0 (0%) 0 (0%)
 Obstetric manifestations 20/34 (59%) 0 (0%) NA
  Pregnancy loss 15/20 (75%) 0 (0%) NA
  Preeclampsia 5/20 (25%) 0 (0%) NA
 Laboratory features    
  LAC positivity 24/34 (71%) 18/41 (44%) NP
  aβ2GPI IgG, median OD (25–75th percentile) 1.470 (0.929–1.747) 1.004 (0.655–1.298) 0.139 (0.047–0.444)
  aβ2GPI IgM, median OD (25–75th percentile) 0.350 (0.165–0.576) 0.450 (0.202–0.838) 0.088 (0.049–0.132)
  1. APS anti-phospholipid syndrome, aCL anti-cardiolipin antibodies, DLE discoid lupus erythematosus, DM/PM dermato/polymyositis, LAC lupus anti-coagulant, NA not applicable, NP not performed, OD optical density, PBC primary biliary cirrhosis, SARD systemic autoimmune rheumatic disease, SLE systemic lupus erythematosus, SSc systemic scleroderma, SjS Sjögren syndrome, UCTD undifferentiated connective tissue disease