A compound attribute that is the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of KIF-binding protein (human) in blood. The trait is CDKN2D/KIFBP protein level ratio in blood (OBA_2055460). Also known as: the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of KIF-binding protein (human) in blood.