A compound attribute that is the ratio of amount of death domain-containing protein CRADD (human) in blood to amount of FAS-associated death domain protein (human) in blood. The trait is CRADD/FADD protein level ratio in blood (Ontology of Biological Attributes entry OBA_2054516). Also known as: the ratio of amount of death domain-containing protein CRADD (human) in blood to amount of FAS-associated death domain protein (human) in blood.