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ISSN 1001-5256 (Print)
ISSN 2097-3497 (Online)
CN 22-1108/R
Volume 39 Issue 8
Aug.  2023
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Article Contents

Effect of pegylated interferon α-2b on serum HBsAg clearance rate in treatment of patients with chronic hepatitis B

DOI: 10.3969/j.issn.1001-5256.2023.08.009
Research funding:

China Research on Reducing the Incidence of Liver Cancer in Hepatitis B Patients (Oasis) Project (LZGC2022-03)

More Information
  • Corresponding author: SHANG Jia, shangjia666@126.com (ORCID: 0000-0001-9197-8773)
  • Received Date: 2022-11-29
  • Accepted Date: 2023-02-01
  • Published Date: 2023-08-20
  •   Objective  To investigate the effect of pegylated interferon α-2b (PEG-IFNα-2b) on HBsAg clearance in the treatment of chronic hepatitis B (CHB) in a real-world setting.  Methods  A retrospective analysis was performed for 411 CHB patients who attended Department of Infectious Diseases, Henan Provincial People's Hospital, from June 2017 to January 2021, and all these patients were treated with PEG-IFNα-2b. Related clinical data were collected, including sex, age, antiviral treatment regimen, baseline HBsAg level, and post-treatment HBsAg level, and HBsAg clearance rate was observed at 24, 48, and 96 weeks. HBsAg clearance rate at different time points of follow-up was compared between the patients with different baseline HBsAg levels (< 500 IU/mL, 500-1 500 IU/mL, and 1 501-5 000 IU/mL) or with the use of PEG-IFNα-2b after different previous treatment conditions and regimens. The independent-samples t test was used for comparison of continuous data between two groups, and the chi-square test and the trend chi-square test were used for comparison of categorical data between groups.  Results  The HBsAg clearance rate was 9.9% (26/263) in the patients who completed 24 weeks of treatment, 19.7% (25/127) in the patients who completed 48 weeks of treatment, and 41.7% (30/72) in the patients who completed 96 weeks of treatment. There was a significant difference in HBsAg clearance rate between the patients with different baseline HBsAg levels at 24, 48, and 96 weeks of treatment (χ2=52.265, 32.764, and 30.918, all P < 0.01), and HBsAg clearance rate gradually increased over the time of treatment (χtrend2=44.517, 29.147, and 22.260, all P < 0.01). Compared with the HBsAg < 500 IU/mL group, the 500-1 500 IU/mL group and the 1 501-5 000 IU/mL group had a significant reduction in HBsAg clearance rate at 24, 48, and 96 weeks of follow-up (all P < 0.001). As for the comparison of the patients with different treatment conditions (previously untreated or treatment-experienced) and treatment regimens (monotherapy or combined therapy) at 24, 48, and 96 weeks of treatment, there was a significant difference in fame/female ration between the previously untreated group and the treatment-experienced group (χ2=5.029, P=0.025), and there was no significant difference in HBsAg clearance rate between the previously untreated group and the treatment-experienced group and between the monotherapy group and the combined therapy group (all P > 0.05).  Conclusion  PEG-IFNα-2b has a marked effect on HBsAg clearance in the treatment of CHB, and patients with a lower baseline HBsAg level tend to have a higher HBsAg clearance rate. HBsAg clearance rate tends to increase over the time of treatment. A baseline HBsAg level of 500 IU/mL can be used as the cut-off point to identify the dominant population.

     

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