A compound attribute that is the ratio of amount of vascular endothelial growth factor receptor 1 (human) in blood to amount of tissue factor pathway inhibitor 2 (human) in blood. The trait is FLT1/TFPI2 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2055256). Also known as: the ratio of amount of vascular endothelial growth factor receptor 1 (human) in blood to amount of tissue factor pathway inhibitor 2 (human) in blood.