This prospective, single-center observational study investigated whether using 6-hour urine creatinine clearance (CrCl) could serve as a more effective measure for the kidney component of the SOFA score in ICU patients.

Key Findings:

Superior Predictor: The study found that the CrCl calculation, based on a daily 6-hour urine collection, was a better predictor of both ICU mortality and 90-day mortality than the current standard measures (serum creatinine [SCr] level and urine output).

Improved SOFA Score: A modified SOFA score incorporating this 6-hour CrCl is suggested as a better organ failure assessment and prognostic tool.

Statistical Advantage: Compared with SCr, the urinary CrCl displayed significantly higher Area Under the Receiver Operating Characteristic (AUROC) values for mortality prediction across almost all days tested.

Study Scope: The study included 200 patients in a mixed ICU, where the patients’ ICU mortality was 12.0% and 90-day mortality was 29.5%.

This research proposes that adopting the 6-hour urine creatinine clearance provides a more accurate, earlier assessment of kidney function and a superior ability to predict mortality risk in critically ill patients.

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