Table 1.

Bivariate analysis of 90 children with rheumatic diseases. Continuous variables are represented as mean ± SD. Categorical variables are represented as frequencies (percentages).

Disease VariablePrimary APS, SLE, MCTD, SS, n = 59 (%)Other*, n = 31 (%)p
Transiently positive aPL20 (33.9)1 (3.2)0.001
Persistently positive aPL19 (32.2)0< 0.001
Mean A5R, %227 ± 50247 ± 320.030
Thrombosis10 (16.9)00.014
  • * Other autoimmune diseases included juvenile idiopathic arthritis, juvenile dermatomyositis, systemic sclerosis, and systemic vasculitis. APS: antiphospholipid antibody syndrome; aPL: antiphospholipid antibodies; SLE: systemic lupus erythematosus; MCTD: mixed connective tissue disease; SS: Sjögren’s syndrome; A5R: annexin A5 resistance assay.