A compound attribute that is the ratio of amount of insulin-like growth factor-binding protein 1 (human) in blood to amount of insulin-like growth factor-binding protein 2 (human) in blood. The trait is OBA_2054353 (IGFBP1/IGFBP2 protein level ratio in blood). Also known as: the ratio of amount of insulin-like growth factor-binding protein 1 (human) in blood to amount of insulin-like growth factor-binding protein 2 (human) in blood.