A compound attribute that is the ratio of amount of secretogranin-1 (human) in blood to amount of neural proliferation differentiation and control protein 1 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055563 (CHGB/NPDC1 protein level ratio in blood). Also known as: the ratio of amount of secretogranin-1 (human) in blood to amount of neural proliferation differentiation and control protein 1 (human) in blood.