Prediction of SBP in Cirrhotic Patients by Platlet Count, Na and AlBl Index.

This is a prospective observational study designed to enhance the prediction of spontaneous bacterial peritonitis (SBP) in patients with liver cirrhosis and ascites by integrating serum sodium levels and platelet count with the Albumin-Bilirubin (ALBI) score. SBP remains a serious and potentially fatal complication in cirrhotic patients, with delayed diagnosis contributing to poor outcomes. The ALBI score, which reflects liver function objectively, along with hyponatremia and thrombocytopenia-common in cirrhosis-may provide a simple, low-cost method for early identification of patients at high risk for SBP. The study will be conducted over 6 months at the Internal Medicine and Hepatology Units, Sohag University Hospital. All eligible adult patients (≥18 years) with liver cirrhosis and ascites who undergo diagnostic paracentesis will be screened for inclusion. Inclusion criteria include cirrhotic patients with ascites undergoing diagnostic paracentesis. Exclusion criteria include secondary peritonitis, advanced hepatocellular carcinoma, obstructive jaundice, recent antibiotic use (\<7 days), end-stage renal disease requiring dialysis, current use of immunosuppressive therapy, and incomplete data. Each participant will undergo clinical evaluation and laboratory testing, including serum albumin, bilirubin (for ALBI calculation), sodium, and platelet count. Ascitic fluid analysis will be performed to diagnose SBP based on PMN count ≥250 cells/mm³. The study will assess whether a combined score (ALBI-Na-Platelet) can improve prediction accuracy. Statistical analysis will involve logistic regression and ROC curve analysis to evaluate the predictive power of the combined parameters. All participants will provide written informed consent. The study is approved by the Medical Ethics Committee of Sohag University, Faculty of Medicine.