A compound attribute that is the ratio of amount of interleukin-18-binding protein (human) in blood to amount of thrombomodulin (human) in blood. The trait is IL18BP/THBD protein level ratio in blood (OBA_2054426). Also known as: the ratio of amount of interleukin-18-binding protein (human) in blood to amount of thrombomodulin (human) in blood.