A compound attribute that is the ratio of amount of interactor protein for cytohesin exchange factors 1 (human) in blood to amount of mothers against decapentaplegic homolog 1 (human) in blood. The trait is IPCEF1/SMAD1 protein level ratio in blood (OBA_2054380). Also known as: the ratio of amount of interactor protein for cytohesin exchange factors 1 (human) in blood to amount of mothers against decapentaplegic homolog 1 (human) in blood.