A compound attribute that is the ratio of amount of interleukin-1 receptor-associated kinase 1 (human) in blood to amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055523 (IRAK1/NFATC1 protein level ratio in blood). Also known as: the ratio of amount of interleukin-1 receptor-associated kinase 1 (human) in blood to amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood.