Artificial Liver Treatment Improves Survival in Patients with Acute-on-Chronic Liver Failure

Background: The artificial liver support system (ALSS) is recognized as a bridge to liver transplantation (LT) in hepatitis B virus-related acute-on-chronic liver failure (HBV-ACLF) patients; however, its impact on patient survival remains unknown. This study aimed to assess the effects of ALSS on survival in patients with HBV-ACLF. Methods: The clinical data of HBV-ACLF patients receiving standard medical treatment (SMT) plus ALSS (ALSS group, n = 507) or only SMT (SMT group, n = 417) were collected for survival assessment. The main endpoints were cumulative survival rates at days 21, 28 and 90. A case-control matched analysis was used to reduce bias between the ALSS and SMT groups. A propensity score matching (PSM) and inverse probability treatment weighting (IPTW) analysis were performed to confirm the survival effect of ALSS. Findings: In the entire cohort, the cumulative survival rates at days 21, 28 and 90 were significantly higher in patients who underwent ALSS treatment (73.3% vs. 59.6%, 69.2% vs. 56.6%, 56.5% vs. 49.1%, respectively, P