Comparisons of effects of oral anticoagulant therapy on circulating APC, protein C, FII, and FX.

● represents patients using oral anticoagulants. ○ indicates SLE patients without oral anticoagulant treatment. (A) Correlation between FII/protein C ratio and protein C level (chromogenic). (B) Correlation between APC/protein C ratio and protein C level (chromogenic). (C) Correlation between APC/FII ratio and FII level. (D) Correlation between APC/FX ratio and FX level.