CST3/EFEMP1 protein level ratio in blood (OBA_2054474) can be described as follows. A compound attribute that is the ratio of amount of cystatin-C (human) in blood to amount of EGF-containing fibulin-like extracellular matrix protein 1 (human) in blood. Also known as: the ratio of amount of cystatin-C (human) in blood to amount of EGF-containing fibulin-like extracellular matrix protein 1 (human) in blood.