A compound attribute that is the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of dual adapter for phosphotyrosine and 3-phosphotyrosine and 3-phosphoinositide (human) in blood. The trait is CDKN2D/DAPP1 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2055456). Also known as: the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of dual adapter for phosphotyrosine and 3-phosphotyrosine and 3-phosphoinositide (human) in blood.