LAC titer and anti-β2GPI IgG titer in patients with LAC. (A) ROC analysis for the LAC titer (n = 54) and anti-β2GPI IgG titer (n = 52), with indication of the criterion value suggested as the best discriminator for disease, measured in plasma of patients with LACs with LAC titer more than 0 AU. (B) Box-and-whisker plots for LAC titer (n = 54) in arbitrary units (AU/mL) and anti-β2GPI-titer (n = 52) in IgG arbitrary units (GAU/mL) in patients (pat.) without or with TECs (n = 54). P value, calculated with the Mann-Whitney test, represents the comparisons between the 2 patient groups. (C) Dot plot of the LAC titer versus the anti-β2GPI IgG titer in plasma of patients positive for LACs with LAC titer more than 0 (n = 52). The thick lines represent the cutoff value for high LAC titers (≥ 10 AU) and anti-β2GPI titers (≥ 3 GAU/mL).