CD40LG and systemic lupus erythematosus: According to multivariate regression modeling, younger age (OR=0.814, 95%CI OR=0.74-0.89, p<0.001), the presence of anti-EBV-EA(D) IgG antibodies (OR=24.086, 95%CI OR=2.68-216.07, p=0.004), higher titers of anti-EBNA1 IgG antibodies (OR=1.023, 95%CI OR=1.01-1.03 p<0.001) and anti-EBV-CA IgM antibodies (OR=3.105, 95%CI OR=1.07-8.98, p=0.036), and lower titer of anti-EBV-CA IgG antibodies (OR=0.984, 95%CI OR=0.97-0.99, p=0.013) were independently associated with the presence of systemic lupus erythematosus (Table 3).