A compound attribute that is the ratio of amount of cadherin-5 (human) in blood to amount of platelet endothelial aggregation receptor 1 (human) in blood. The trait is CDH5/PEAR1 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054403). Also known as: the ratio of amount of cadherin-5 (human) in blood to amount of platelet endothelial aggregation receptor 1 (human) in blood.