Cystatin C Falsely Underestimated GFR in a Critically Ill Patient with a New Diagnosis of AIDS

Table 2

Creatinine clearance following the 8-hour urine collections.

Hospital day	Urine creatinine (mg/dL)	Serum creatinine (mg/dL)	Urine volume (mL)	Collection duration (hours)	Urine creatinine clearance (mL/min)
10	24	0.2	714	8	179
14	10	0.2	2132	8	222

Hospital day 1 reflects the day of transfer from the outside facility to our center.
Creatinine clearance (mL/min) = urine creatinine × volume (in mL)/serum creatinine × (time (in hours) 60).