This Phase 4 study is designed for the collection of blood biomarker samples from participants who have completed CHB treatment with at least 24 weeks of a pegylated interferon alfa-2a (Peg-IFN alfa-2a) containing regimen and at least 24 weeks post-treatment follow-up. Participants may be enrolled from historical studies supported or sponsored by Roche, ongoing studies supported or sponsored by Roche, or from general medical practice. The follow-up of individuals who choose to participate in this study will be in accordance with the ongoing studies or with the general medical practice of the physician. Data from whole blood deoxyribonucleic acid (DNA) samples collected in the GV28555 study or available from previously collected Roche Clinical Repository (RCR) samples will be used for combined analysis with data from other applicable studies. Procedures will include blood sample collection (not applicable for participants who previously have consented and donated RCR DNA samples) and medical record capture.
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Single Nucleotide Polymorphisms (SNPs) Associated With HBeAg Seroconversion or Hepatitis B Surface Antigen (HBsAg) Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive East Asian (CN) Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable Hepatitis B Virus (HBV) Deoxyribonucleic Acid (DNA) or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Positive Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Negative Non-East Asian (Non-CN) Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Negative Non-CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Negative CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Negative CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Negative Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With Undetectable HBV DNA or HBsAg Clearance ≥24 Weeks Post-Treatment in HBeAg-Negative Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in Non-CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in Non-CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in Non-CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in Non-CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment in CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBeAg Seroconversion Plus Undetectable HBV DNA, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in Non-CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in Non-CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in CN Population: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in CN Population: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment: Additive Model
Timeframe: Single blood sample ≥24 weeks post-treatment
SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment: Dominant Model
Timeframe: Single blood sample ≥24 weeks post-treatment