NSBBs, EBL or Combined Therapy for High-Risk Varices: Systematic Review and Meta-Analysis

Area of Science:

• Gastroenterology
• Hepatology
• Clinical Medicine

Background:

• Non-selective beta blockers (NSBB) are standard for primary prophylaxis of high-risk esophageal varices.
• Endoscopic band ligation (EBL) is typically reserved for patients intolerant to NSBB.
• Comparative effectiveness of NSBB, EBL, and combination therapy requires further investigation.

Purpose of the Study:

• To compare the clinical outcomes of NSBB, EBL, and combined therapy for primary prophylaxis of high-risk esophageal varices.
• To evaluate the efficacy of combined therapy in preventing variceal bleeding and related mortality.
• To inform clinical guidelines for managing high-risk esophageal varices.

Main Methods:

• Systematic meta-analysis of randomized controlled trials (RCTs) identified through major databases (MedLine, Embase, Cochrane Library).
• Inclusion criteria focused on studies comparing combined therapy versus NSBB alone versus EBL alone.
• Random-effects model used for meta-analysis, with heterogeneity assessed by I² statistics.

Main Results:

• Six RCTs involving 1011 participants (302 NSBB, 300 EBL, 409 combined) were included.
• Combined therapy significantly reduced the first episode of variceal bleeding compared to NSBB alone (RR 0.39) and EBL alone (RR 0.46).
• Pooled bleeding rates were 9.4% for combined therapy, 28.2% for NSBB, and 13.9% for EBL. Bleeding-related mortality was also lower with combined therapy.

Conclusions:

• Combined therapy demonstrates superior efficacy in primary prophylaxis of high-grade varices, significantly reducing variceal bleeding risk.
• The findings support the integration of combined therapy into clinical practice and future guidelines.
• Combined therapy offers a more effective strategy than NSBB or EBL alone for preventing esophageal variceal bleeding.