A compound attribute that is the ratio of amount of macrophage colony-stimulating factor 1 (human) in blood to amount of interferon gamma receptor 1 (human) in blood. The trait is CSF1/IFNGR1 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2054465). Also known as: the ratio of amount of macrophage colony-stimulating factor 1 (human) in blood to amount of interferon gamma receptor 1 (human) in blood.