A compound attribute that is the ratio of amount of macrophage colony-stimulating factor 1 (human) in blood to amount of sialoadhesin (human) in blood. The trait is CSF1/SIGLEC1 protein level ratio in blood (OBA_2054471). Also known as: the ratio of amount of macrophage colony-stimulating factor 1 (human) in blood to amount of sialoadhesin (human) in blood.