ACLY and systemic lupus erythematosus: As indicated in Figure 1, the median IgA aCL levels in patients with PAPS, probable APS, SLE + APS, and SLE were higher than those in the control group (p < 0.000001), higher in patients with PAPS, probable APS, SLE + APS than those in patients of the control group (p < 0.0001, 0.01; < 0.0001, respectively), and higher in patients with PAPS and SLE + APS than those in patients with SLE (p = 0.0001 and p < 0.0001, respectively).