C-Reactive Protein/Albumin Ratio Predicts Acute Kidney Injury in Patients With Moderate to Severe Chronic Kidney Disease and Non-ST-Segment Elevation Myocardial Infarction

In this study, we aimed to evaluate the predictive value of admission C-reactive protein/albumin ratio (CAR) for acute kidney injury (AKI) in cases with moderate to severe chronic kidney disease (CKD) not on dialysis who presented with non-ST-segment elevation myocardial infarction (NSTEMI) and underwent coronary angiography (CAG). This cross-sectional and observational study included 420 NSTEMI patients. The study population was categorized based on the CAR tertiles as groups T1, T2, and T3. The primary outcome of the study was AKI development; 92 (21.9%) cases developed AKI. The frequency of AKI was significantly higher in the T3 group compared with the T2 and T1 groups (34% vs 17% vs 14%, P < .001). Age, estimated glomerular filtration rate, contrast media volume, and CAR (odds ratio: 1.36; 95% CI: 1.17-1.57; P < .01) were significant predictors of AKI. In a receiver operating characteristic curve analysis, CAR levels >0.20 predicted AKI development with a sensitivity of 74% and a specificity of 45%. We observed that the CAR may be a promising inflammatory parameter for AKI in NSTEMI patients with moderate to severe CKD after CAG.