A compound attribute that is the ratio of amount of arylsulfatase A (human) in blood to amount of protein CREG1 (human) in blood. The trait is ARSA/CREG1 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054091). Also known as: the ratio of amount of arylsulfatase A (human) in blood to amount of protein CREG1 (human) in blood.