A Study to Collect Blood Biomarker Samples From Participants With Chronic Hepatitis B (CHB) Who Received Treatment With Pegasys (Peginterferon Alfa-2a) ± Nucleoside/Nucleotide Analogue

Study Overview
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Brief Summary
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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.

Official Title
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A Phase IV, Blood Sample Collection Study For Exploratory Evaluation of the Association of Single Nucleotide Polymorphisms With Treatment Responses From Subjects With HBe-Antigen Positive or Negative Chronic Hepatitis B, Who Received Therapy for Hepatitis B With Peginterferon Alfa-2a 40kD (Peg-IFN) ± Nucleos(t)Ide Analogue

Conditions
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Hepatitis B, Chronic

Intervention / Treatment
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* Drug: Peg-IFN alfa-2a


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adults greater than or equal to (≥) 18 years of age CHB Previously enrolled in a Roche study and treated for CHB for ≥24 weeks with Peg-IFN ± nucleoside analogue (lamivudine or entecavir) or Peg-IFN ± nucleotide analogue (adefovir) and with ≥24 weeks post-treatment follow-up; or Treated in general practice for CHB with Peg-IFN according to standard of care and in line with the current Summary of Product Characteristics (SmPC)/local labeling who have no contraindication to Peg-IFN therapy as per local label and have been treated with Peg-IFN for ≥24 weeks and have ≥24 week post-treatment response available at the time of blood sample collection Exclusion Criteria: Hepatitis A, hepatitis C, or human immunodeficiency virus (HIV) infection

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Adult CHB Participants Treated With Peg-IFN Alfa-2a<br>Adult participants with CHB infection, and who have completed at least 24 weeks of Peg-IFN alfa-2a with/without nucleoside analogue therapy and at least 24 weeks of follow-up, will be included. Participants will be recruited from Roche clinical trials or general practice; no treatment will be administered in this non-interventional study. | Drug: Peg-IFN alfa-2a<br>* Participants received Peg-IFN alfa-2a prior to enrollment for at least 24 weeks. Dosing was chosen according to standard of care or at the discretion of the treating physician.<br>* Other names: Pegasys;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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 | Genome-wide association study (GWAS) approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of the antibody to HBeAg (anti-HBe). HBsAg clearance was defined as the loss of HBsAg, with or without detection of the antibody to HBsAg (anti-HBs). Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as HBV DNA level below the lower limit of detection (LLD) of 2000 international units per milliliter (IU/mL). HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs17037122) was included in the analysis. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs17037122) was included in the analysis. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs2464266) was included in the analysis. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs17037122) was included in the analysis. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment: Additive Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBeAg Seroconversion, HBsAg Clearance, or Undetectable HBV DNA ≥24 Weeks Post-Treatment: Dominant Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | 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 | GWAS approach was used to evaluate the association of SNPs with treatment response. HBeAg seroconversion was defined as the loss of HBeAg and detection of anti-HBe. Undetectable HBV DNA was defined as an HBV DNA level below the LLD of 2000 IU/mL. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. HBeAg seroconversion and undetectable HBV DNA were a combined criterion in treatment response. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in Non-CN Population: Additive Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs12992677) was included in the analysis. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in Non-CN Population: Dominant Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs12992677) was included in the analysis. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in CN Population: Additive Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs7549785) was included in the analysis. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment in CN Population: Dominant Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs7549785) was included in the analysis. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment: Additive Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to additive models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. | Single blood sample ≥24 weeks post-treatment | 
| SNPs Associated With HBsAg Clearance ≥24 Weeks Post-Treatment: Dominant Model | GWAS approach was used to evaluate the association of SNPs with treatment response. HBsAg clearance was defined as the loss of HBsAg, with or without detection of anti-HBs. Associations with treatment response were analyzed using logistic regression and adjusted for covariates. Markers were coded according to dominant models of inheritance. Markers surpassing p-value thresholds of p<10^-5 and p<5x10^-8 were considered suggestive and genome-wide significant, respectively. Larger beta coefficients correspond to greater likelihood of treatment response. Only a single SNP (rs6592052) was included in the analysis. | Single blood sample ≥24 weeks post-treatment |