137.0 mequiv./L; P = 0.001); P = no. No differences were observed with respect to age, race, aetiology of cirrhosis, diabetes, hypertension, hepatocellular carcinoma, prior upper gastrointestinal bleeding, spontaneous check details bacterial peritonitis, current use of diuretics, urea, haemoglobin, platelets, serum sodium, serum potassium, spot urine potassium, ALT, ALP, GGT, albumin, and INR when individual with poor urinary sodium excretion were compared to those with Nau24h ≥ 78 mequiv. There was a strong positive correlation between the

Na/Ku and Nau24h (r = 0. 857, P < 0.001) ( Fig. 1). A negative correlation between MELD score (r = −0.498; P = 0.025) and serum creatinine (r = −0.498; P = 0.025) was evidenced. There were no significant correlations between the Na/Ku ratio and age, platelet count, serum sodium, AST, ALT, direct bilirubin, GSK1120212 chemical structure albumin and INR. The AUROC for Na/Ku in the prediction of

Nau24h < 78 mequiv. was 0.948 ± 0.046, P = 0.001 ( Fig. 2). Table 3 shows in details the diagnostic performance of the Na/Ku ratio in predicting Nau24h < 78 mequiv. For the Na/Ku ratio, the classical cut-off (≤1.0) showed 70% positive predictive value (PPV) to diagnose Nau24h dosage < 78 mequiv. with negative predictive value (NPV) of 90%, accuracy of 80%, 88% sensitivity and specificity of 75%. Cirrhosis is the twelfth leading cause of death in the United States of America.17 Several authors evaluated patients with decompensated liver cirrhosis ascites. Usually, the studied population is predominantly composed by men, 59–74%, age ranging from 53.6 to 60 years.18, 19 and 20 In this study it has been observed that 70% of subjects were male; mean age was 56.1 years, which coincides with that described in literature. With regard to the aetiology of cirrhosis, it varies according to the prevalence of the diseases on the studied area,

with a higher prevalence of HBV (64.8%) in China, higher incidence of alcoholic cirrhosis (76.4%) in Germany (19) and Barcelona (44.7%).18 The present study demonstrated a higher prevalence of HCV as compared to Europe and Asia, the latter Abiraterone being an area of high prevalence of HBV21 and exhibits high prevalence of alcoholism as a cause of chronic liver disease. In cirrhosis, the development of ascites and diuretic response are determined by the renin–angiotensin–aldosterone and renal sodium handling.22 This study observed that patients presenting with more severe liver disease (MELD, creatinine, bilirubin, AST) are those who have lowest urinary sodium excretion. Likewise, Cholongitas et al. recently demonstrated that the factors independently associated with poor urinary sodium excretion in cirrhosis are albumin, creatinine and Na/Ku.11 The Na/Ku ratio emerged as an option to Nau24h in evaluating the ability of cirrhotic patients with ascites to excrete salt. During ascites treatment, absence of weight loss may be secondary to poor response to diuretics or a consequence of non-adherence to low sodium diet.