Distribution of antiphospholipid antibodies
The distribution of all criterial or non-criterial aPLs among different patient groups was shown in Figure 3. Levels of aPLs were calculated with (log(test value + 2)U/ml). The results of primary or secondary APS were compared to other groups. No significant difference was observed between primary and secondary APS, except for aCL IgM (p = 0.029) and aβ2GpI IgA (p = 0.043). Compared to HC, levels of IgG and IgA were significantly higher for four aPLs in both PAPS and SAPS group. However, IgM results varied for different aPLs.