A compound attribute that is the ratio of amount of protein AMBP (human) in blood to amount of EGF-containing fibulin-like extracellular matrix protein 1 (human) in blood. The trait is AMBP/EFEMP1 protein level ratio in blood (Ontology of Biological Attributes term OBA_2054310). Also known as: the ratio of amount of protein AMBP (human) in blood to amount of EGF-containing fibulin-like extracellular matrix protein 1 (human) in blood.