A compound attribute that is the ratio of amount of forkhead box protein O1 (human) in blood to amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054146 (FOXO1/NFATC1 protein level ratio in blood). Also known as: the ratio of amount of forkhead box protein O1 (human) in blood to amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood.