A compound attribute that is the ratio of amount of ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase 1 (human) in blood to blood interleukin-12 amount. The trait is CD38/interleukin 12 protein level ratio in blood (OBA_2054197, an Ontology of Biological Attributes id). Also known as: the ratio of amount of ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase 1 (human) in blood to blood interleukin-12 amount.