The significance of C-reactive protein to albumin ratio in patients with decompensated cirrhosis

BACKGROUND: Prognostic indicators in patients with decompensated cirrhosis are vital for the estimation of death risk. The ratio of C-reactive protein to albumin (CAR) has been verified as a prognostic marker in patients with hepatocellular carcinoma and decompensated cirrhosis related to hepatitis B virus. Neutrophil-to-lymphocyte ratio (NLR), lymphocyte-to-monocyte ratio (LMR), and gamma globulins have been separately studied in cirrhosis. We evaluated the predictive role of CAR and other inflammatory markers in decompensated patients. METHODS: We prospectively studied 159 patients with stable decompensated cirrhosis, calculating the following indexes: CAR, NLR, LMR, Child-Turcotte-Pugh (CTP), and model for end-stage liver disease (MELD). RESULTS: MELD (area under the curve [AUC] 0.814) and CTP score (AUC 0.752) were superior to the other markers above in predicting patients’ mortality (P<0.05). Patients with CAR<2.17 (median value) presented better times of survival: 20 months (12-27) vs. 14 months (10-17) (log rank P=0.015). NLR and LMR barely discriminated patients’ prognosis. In multivariate analysis, only MELD and CTP scores were significant risk factors, whether using the proposed cutoff of 1.3 (hazard ratio [HR] 1.17 [1.106-2.44], P<0.001) or the median 2.17 CAR categorical variable (HR 1.17 [1.104-1.243], P<0.001). When patients who underwent liver transplantation were excluded, apart from the MELD and CTP scores CAR 2.17 was the only significant factor associated with the outcome (HR 3.61 [0.96-13.6], P=0.05) and detected different survival times: 10 (1-48) vs. 11 (2-38) months, log rank P=0.003. Patients with LMR≥1.9 presented significantly better renal function, in terms of true glomerular filtration rate (80±34 vs. 64±33 mL/min, P=0.004) and creatinine levels: 0.84 (0.1-1.8) vs. 0.98 (0.59-3.3) mg/dL (P=0.001). CONCLUSION: Our findings demonstrate the significance of CAR and LMR in the outcome and renal function of decompensated patients.