A compound attribute that is the ratio of amount of angiopoietin-1 (human) in blood to amount of platelet-derived growth factor subunit A (human) in blood. The trait is ANGPT1/PDGFA protein level ratio in blood (OBA_2054273). Also known as: the ratio of amount of angiopoietin-1 (human) in blood to amount of platelet-derived growth factor subunit A (human) in blood.