A compound attribute that is the ratio of amount of platelet-derived growth factor subunit A (human) in blood to amount of plasminogen activator inhibitor 1 (human) in blood. The trait is PDGFA/SERPINE1 protein level ratio in blood (OBA_2054049). Also known as: the ratio of amount of platelet-derived growth factor subunit A (human) in blood to amount of plasminogen activator inhibitor 1 (human) in blood.