CST3 and cancer: Table 1 lists the admission diagnosis of the study population. Neurologic disease (18.75%) was the most common admission diagnosis followed by malignancy (15%) and multiple blunt trauma without head injury (11.25%). Forty two (52.5%) patients were mechanically ventilated. The mean ± SD serum creatinine, cystatin C, 24-hour urine volume, and measured Ccr of the study population were 0.89 ± 0.25 mg/dL, 0.88 ± 0.41 mg/L, 2983.07 ± 1612.48 mL, and 65.07 ± 36.19 mL/min/1.73 m2, respectively.