A compound attribute that is the ratio of amount of osteomodulin (human) in blood to amount of osteopontin (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2055144 (OMD/SPP1 protein level ratio in blood). Also known as: the ratio of amount of osteomodulin (human) in blood to amount of osteopontin (human) in blood.