A compound attribute that is the ratio of amount of C-C motif chemokine 18 (human) in blood to amount of tissue factor pathway inhibitor (human) in blood. The trait is CCL18/TFPI protein level ratio in blood (OBA_2054701). Also known as: the ratio of amount of C-C motif chemokine 18 (human) in blood to amount of tissue factor pathway inhibitor (human) in blood.