Table 3.

Comparison between the kidney markers serum creatinine and cystatin C

Characteristics	Creatinine	Cystatin C
Excretion by kidney	Yes	No
Reabsorption/secretion by renal tubules	Yes	No
Level affected by GA	Yes	No
Level affected by muscle mass	Yes	No
Level affected by gender	Yes	No
Influence from maternal plasma level	Yes	No

GA gestational age