Clinical and Biochemical Profile Associated with Renal Recovery after Acute Kidney Injury in A Mexican Population: Retrospective Cohort Study.

Background and Objectives : Our primary objective was to study the clinical and biochemical characteristics associated with acute kidney injury (AKI) remission in a group of Mexican patients. Materials and methods : We retrospectively enrolled 75 patients who were diagnosed with AKI and separated the sample into two groups: nonremitting patients ( n = 27, 36%) vs. remitting patients ( n = 48, 64%). Results : We found significant relationships between nonremitting AKI and previous diagnosis of chronic kidney disease ( p = 0.009), higher serum creatinine (Cr) at admission ( p < 0.0001), lower estimated glomerular filtration rate (eGFR) ( p < 0.0001), maximum serum creatinine during hospitalization ( p < 0.0001), higher fractional excretion of sodium (FENa) ( p < 0.0003) and 24-h urine protein ( p = 0.005), higher serum potassium on admission ( p = 0.025), abnormal levels of procalcitonin ( p = 0.006), and increased risk of death ( p = 0.015). Conclusion : Chronic kidney disease (CKD), lower eGFR, higher levels of serum creatinine during hospitalization, higher FENa and 24-h urine protein, abnormal levels of procalcitonin, and higher serum potassium on admission were associated with nonremitting AKI. These findings may facilitate the rapid identification of patients at risk for nonremitting AKI based on clinical and biochemical characteristics. Furthermore, these findings may inform the design of timely strategies for the vigilance, prevention, and treatment of AKI.