Serum/urine levels of creatinine and cystatin C.

Absolute creatinine in severe patients increased 3 fold over next 48 hours and the levels continue to increase. However, both serum and urinary cystatin C levels remain steady over time. Change in creatinine and cystatin C represent the absolute change in these two functional markers from the baseline values. Data are presented as median with IQR. Serum/urine levels of creatinine and cystatin C.