Systematic review with meta-analysis: Change in liver stiffness during anti-viral therapy in patients with hepatitis B.

Background: Time-varying impact of anti-viral therapy on liver stiffness in patients with hepatitis B is unclear.

Aims: To estimate the magnitude and kinetics of change in liver stiffness in hepatitis B patients treated with nucleot(s)ide analogs.

Methods: Through a systematic review of multiple databases, we identified 24 studies in adults with hepatitis B who underwent transient elastography before and at least 6 months after starting nucleot(s)ide analogs therapy. We estimated change in liver stiffness 6 m, 12 m, 24 m, 36 m and 60 m after starting therapy, as weighted mean difference and 95% confidence intervals, using random-effects meta-analysis.

Results: Liver stiffness significantly declined by 2.21 kPa (95% CI, -1.36 to -3.05), 2.56 kPa (-2.23 to -2.89), 3.73 kPa (-2.98 to -4.49), 4.15 kPa (-2.75 to -5.54), and 5.19 kPa (-3.34 to -7.03) at 6 months, 1 year, 2 years, 3 years, and 5 years from the start of therapy, respectively (p < 0.001). High baseline alanine aminotransferase level, viral load and liver stiffness were associated with greater magnitude of decline in liver stiffness.

Conclusions: Antiviral therapy is associated with progressive decline in liver stiffness in patients with hepatitis B, particularly in patients with high baseline alanine aminotransferase and viral load.