A compound attribute that is the ratio of amount of cardiotrophin-1 (human) in blood to amount of integrin beta-1-binding protein 2 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2054487 (CTF1/ITGB1BP2 protein level ratio in blood). Also known as: the ratio of amount of cardiotrophin-1 (human) in blood to amount of integrin beta-1-binding protein 2 (human) in blood.