A compound attribute that is the ratio of amount of T-cell surface glycoprotein CD5 (human) in blood to amount of tumor necrosis factor receptor superfamily member 9 (human) in blood. The trait is CD5/TNFRSF9 protein level ratio in blood (OBA_2054176). Also known as: the ratio of amount of T-cell surface glycoprotein CD5 (human) in blood to amount of tumor necrosis factor receptor superfamily member 9 (human) in blood.