A Study of Pegasys (Peginterferon Alfa-2a) Versus Untreated Control in Children With HBeAg Positive Chronic Hepatitis B

Phase 3

Completed

• Conditions: Hepatitis B, Chronic
• Interventions: Drug: peginterferon alfa-2a [Pegasys]

• Registration Number: NCT01519960
• Lead Sponsor: Hoffmann-La Roche

Brief Summary

This parallel group, open label study will evaluate the safety and efficacy of Pegasys (peginterferon alfa-2a) versus untreated control in children (age 3 years to \<18 years at baseline) with HBeAg positive chronic hepatitis B. Children without advanced fibrosis and without cirrhosis will be randomized 2:1 to treatment Group A, receiving Pegasys 45-180 mcg subcutaneously weekly for 48 weeks, or to the untreated control Group B. Children with advanced fibrosis will be assigned to treatment group C and receive 48 weeks of treatment with Pegasys. Children in the untreated control Group B who have not experienced seroconversion 48 weeks after randomization may enter the Switch Arm to receive 48 weeks of Pegasys treatment. This offer will be available for 1 year following 48 weeks from randomization. Anticipated time on study treatment is 48 weeks. All subjects will be followed up for 5 years after the end of treatment (A,C,Switch)/principal observation (B) period.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2011-12-06
• Study First Submitted QC: 2012-01-24
• Study First Posted: 2012-01-27
• Study Start: 2012-07-11
• Primary Completion: 2015-07-09
• Results First Submitted: 2016-07-08
• Results First Submitted QC: 2016-07-08
• Results First Posted: 2016-08-17
• Study Completion: 2021-10-18
• Status Verified: 2022-10
• Last Update Submitted: 2022-10-26
• Last Update Posted: 2022-11-18

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 165

Inclusion Criteria

• Male or female patients, 3 years to <18 years of age at baseline
• Positive HBsAg for more than 6 months
• Positive HBeAg and detectable HBV DNA at screening
• A liver biopsy obtained within the past 2 years prior to baseline (and more than 6 months after the end of previous therapy for hepatitis B) to confirm the presence of advanced fibrosis or exclude cirrhosis
• Compensated liver disease (Child-Pugh Class A)
• Elevated serum alanine transferase (ALT)
• Normal thyroid gland function at screening

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Exclusion Criteria

• Subjects with cirrhosis
• Subjects must not have received investigational drugs or licensed treatments with anti-HBV activity within 6 months of baseline. Subjects who are expected to need systemic antiviral therapy other than that provided by the study at any time during their participation in the study are also excluded
• Known hypersensitivity to peginterferon
• Positive test results at screening for hepatitis A, hepatitis C, hepatitis D or HIV infection
• History or evidence of medical condition associated with chronic liver disease other than chronic hepatitis B
• History or evidence of bleeding from esophageal varices
• Decompensated liver disease (e.g. ascites, Child-Pugh Class B or C)
• History of immunologically mediated disease
• Pregnant or lactating females

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Switch	peginterferon alfa-2a [Pegasys]	-
A Pegasys	peginterferon alfa-2a [Pegasys]	-
C Fibrosis non-randomized	peginterferon alfa-2a [Pegasys]	-

Primary Outcome Measures

Name	Time	Method
Percentage of Participants With HBeAg Seroconversion at 24 Weeks After End of Treatment (EOT)/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of hepatitis B envelope antibody (anti-HBe). The percentage of participants with HBeAg seroconversion at 24 weeks after EOT/POP was reported. The 95 percent (%) confidence interval (CI) was calculated by the Pearson-Clopper method. Intent-to-Treat (ITT) Population: All randomized participants regardless of treatment received.

Secondary Outcome Measures

Name	Time	Method
Percentage of Participants With Hepatitis B Surface Antigen (HBsAg) Seroconversion at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	HBsAg seroconversion was defined as loss of HBsAg and the presence of hepatitis B surface antibody (anti-HBs). The percentage of participants with HBsAg seroconversion at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Loss of HBeAg at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	The percentage of participants with loss of HBeAg at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Normal ALT at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	Normal ALT was defined as ALT less than or equal to (≤) ULN, where each ULN was given by the laboratory at which the sample was analyzed. The percentage of participants with normal ALT at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA <2,000 IU/mL at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<2,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <2,000 IU/mL at EOT/POP in Groups A and B	Week 48	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<2,000 IU/mL at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Quantitative HBV DNA Level in Groups A and B	Baseline; Weeks 12, 24, 36, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	Quantitative HBV DNA at each visit was averaged among all participants and expressed in log10 IU/mL. ITT Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With HBeAg Seroconversion at EOT in Group C	Week 48	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. The percentage of participants with HBeAg seroconversion at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With >15% Drop in Weight Percentile for Age in Groups A and B	Weeks 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The percentage of participants with \>15% drop in weight percentile for age from Baseline to each visit was reported. Safety Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Quantitative HBsAg Level in Group C	Baseline; Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	Quantitative HBsAg at each visit was averaged among all participants and expressed in log10 IU/mL. Safety Population.
Percentage of Participants With >15% Drop in Height Percentile for Age in Group C	Weeks 30, 36; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The percentage of participants with \>15% drop in weight percentile for age from Baseline to each visit was reported. Safety Population.
Change From Baseline in Height for Age Z-Score in Groups A and B	Baseline; Weeks 12, 24, 36, 48; FU Weeks 12, 24 (up to 72 weeks overall)	The difference between the population mean and raw scores was calculated as the height for age z-score. Mean absolute values at Baseline were reported. The change from Baseline to each visit was averaged among all participants and expressed in units of standard deviations. Safety Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With HBV Deoxyribonucleic Acid (DNA) <20,000 International Units Per Milliliter (IU/mL) at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using polymerase chain reaction (PCR) by Roche Taqman. The percentage of participants with HBV DNA \<20,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <20,000 IU/mL at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<20,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Loss of HBeAg at EOT/POP in Groups A and B	Week 48	The percentage of participants with loss of HBeAg at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Change From Baseline in Quantitative HBV DNA Level in Groups A and B	Weeks 12, 24, 36, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The change in quantitative HBV DNA from Baseline to each visit was averaged among all participants and expressed in log10 IU/mL. ITT Population. All participants were included in the endpoint analysis. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With HBsAg Seroconversion at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBsAg seroconversion was defined as loss of HBsAg and the presence of anti-HBs. The percentage of participants with HBsAg seroconversion at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With HBV DNA <2,000 IU/mL at EOT in Group C	Week 48	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<2,000 IU/mL at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With HBV DNA Undetectable at EOT in Group C	Week 48	HBV DNA was quantified using PCR by Roche Taqman. Undetectable HBV DNA was defined as HBV DNA \<29 IU/mL. The percentage of participants with HBV DNA undetectable at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <2,000 IU/mL at EOT in Group C	Week 48	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<2,000 IU/mL at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Quantitative Serum ALT Level in Group C	Baseline; Weeks 1, 2, 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	Quantitative ALT at each visit was averaged among all participants and expressed as a factor of the laboratory-specific ULN (for example, 1 × ULN, 2 × ULN, 3 × ULN). Safety Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Liver Stiffness Measure (LSM) in Groups A, B, C	Week 48; FU Week 24 (up to 72 weeks overall)	Liver elastography was performed to assess elasticity and extent of hepatic fibrosis. The change in LSM from Baseline to each visit was averaged among all participants in expressed in kilopascals (kPa). Positive changes in LSM values corresponded to an increase in stiffness and hepatic fibrosis. Liver Substudy Population: All participants who consented to participate in the liver elasticity substudy. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With HBsAg Seroconversion at EOT/POP in Groups A and B	Week 48	HBsAg seroconversion was defined as loss of HBsAg and the presence of anti-HBs. The percentage of participants with HBsAg seroconversion at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Loss of HBsAg at EOT/POP in Groups A and B	Week 48	The percentage of participants with loss of HBsAg at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA <2,000 IU/mL at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<2,000 IU/mL at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <2,000 IU/mL at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<2,000 IU/mL at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With HBsAg Seroconversion at EOT in Group C	Week 48	HBsAg seroconversion was defined as loss of HBsAg and the presence of anti-HBs. The percentage of participants with HBsAg seroconversion at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Change From Baseline in Quantitative HBV DNA Level in Group C	Weeks 12, 24, 36, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The change in quantitative HBV DNA from Baseline to each visit was averaged among all participants and expressed in log10 IU/mL. Safety Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Estimated Area Under the Concentration-Time Curve (AUC) by BSA Category	Pre-dose (0 hours) at Baseline and Weeks 4, 8, 12, 24; post-dose (24-48, 72-96, 168 hours) during Weeks 1, 24 (up to 24 weeks overall)	AUC was estimated using population pharmacokinetic (PK) modeling. The AUC at steady-state was averaged among participants who received PEG-IFN and reported by BSA category. Categories of BSA-based dosing used in the analysis were as follows: 0.54-0.74 m\^2, 65 mcg; 0.75-1.08 m\^2, 90 mcg; 1.09-1.51 m\^2, 135 mcg; \>1.51 m\^2, 180 mcg. The estimated AUC was expressed in hours by nanograms per milliliter (h\*ng/mL). PK Substudy Population: All participants who consented to participate in the PK substudy. "Number of subjects analyzed" reflects the total combined number of participants who provided evaluable data across all BSA categories. The number of participants who provided evaluable data within each BSA category (n) is shown in the table.
Percentage of Participants With >15% Drop in Height Percentile for Age in Groups A and B	Weeks 12, 24, 36, 48; FU Weeks 12, 24 (up to 72 weeks overall)	The percentage of participants with \>15% drop in height percentile for age from Baseline to each visit was reported. Safety Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Quantitative HBsAg Level in Groups A and B	Baseline; Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	Quantitative HBsAg at each visit was averaged among all participants and expressed in log10 IU/mL. ITT Population. All participants were included in the endpoint analysis. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Quantitative HBsAg Level in Group C	Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	The change in quantitative HBsAg from Baseline to each visit was averaged among all participants and expressed in log10 IU/mL. Safety Population.
Percentage of Participants With HBeAg Seroconversion Over Time in Groups A and B	Baseline, FU Years: 1, 2, 3, 4, 5	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Loss of HBeAg at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	The percentage of participants with loss of HBeAg at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <2,000 IU/mL at 24 Weeks After EOT/POP in Groups A and B	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<2,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBeAg Seroconversion at EOT/POP in Groups A and B	Week 48	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. The percentage of participants with HBeAg seroconversion at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA <2,000 IU/mL at EOT/POP in Groups A and B	Week 48	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<2,000 IU/mL at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA Undetectable at EOT/POP in Groups A and B	Week 48	HBV DNA was quantified using PCR by Roche Taqman. Undetectable HBV DNA was defined as HBV DNA \<29 IU/mL. The percentage of participants with HBV DNA undetectable at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <20,000 IU/mL at EOT/POP in Groups A and B	Week 48	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<20,000 IU/mL at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Quantitative Serum ALT Level in Groups A and B	Baseline; Weeks 1, 2, 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	Quantitative ALT at each visit was averaged among all participants and expressed as a factor of the laboratory-specific ULN (for example, 1 × ULN, 2 × ULN, 3 × ULN). ITT Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With Loss of HBeAg at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	The percentage of participants with loss of HBeAg at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population: All participants who received at least one dose of study drug (if assigned) and had at least one post-baseline safety assessment.
Percentage of Participants With Loss of HBsAg at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	The percentage of participants with loss of HBsAg at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population
Percentage of Participants With Normal ALT at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	Normal ALT was defined as ALT ≤ ULN, where each ULN was given by the laboratory at which the sample was analyzed. The percentage of participants with normal ALT at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With HBV DNA <20,000 IU/mL at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<20,000 IU/mL at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <20,000 IU/mL at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<20,000 IU/mL at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Loss of HBeAg at EOT in Group C	Week 48	The percentage of participants with loss of HBeAg at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Normal ALT at EOT/POP in Groups A and B	Week 48	Normal ALT was defined as ALT ≤ ULN, where each ULN was given by the laboratory at which the sample was analyzed. The percentage of participants with normal ALT at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA <20,000 IU/mL at EOT/POP in Groups A and B	Week 48	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<20,000 IU/mL at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA Undetectable at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using PCR by Roche Taqman. Undetectable HBV DNA was defined as HBV DNA \<29 IU/mL. The percentage of participants with HBV DNA undetectable at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Loss of HBsAg at EOT in Group C	Week 48	The percentage of participants with loss of HBsAg at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Quantitative HBV DNA Level in Group C	Baseline; Weeks 12, 24, 36, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	Quantitative HBV DNA at each visit was averaged among all participants and expressed in log10 IU/mL. Safety Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Quantitative HBeAg Level in Groups A and B	Baseline; Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	Quantitative HBeAg at each visit was averaged among all participants and expressed in log10 Paul Ehrlich Institute units per milliliter (PEIU/mL). ITT Population. All participants were included in the endpoint analysis. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Quantitative HBeAg Level in Group C	Baseline; Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	Quantitative HBeAg at each visit was averaged among all participants and expressed in log10 PEIU/mL. Safety Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With Normal ALT at EOT in Group C	Week 48	Normal ALT was defined as ALT ≤ ULN, where each ULN was given by the laboratory at which the sample was analyzed. The percentage of participants with normal ALT at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With HBV DNA <20,000 IU/mL at EOT in Group C	Week 48	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<20,000 IU/mL at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <20,000 IU/mL at EOT in Group C	Week 48	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<20,000 IU/mL at EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Percentage of Participants With HBsAg Seroconversion at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of hepatitis B envelope antibody (anti-HBe). The percentage of participants with HBeAg seroconversion at 24 weeks after EOT/POP was reported. The 95 percent (%) confidence interval (CI) was calculated by the Pearson-Clopper method. Intent-to-Treat (ITT) Population: All randomized participants regardless of treatment received.
Change From Baseline in Weight for Age Z-Score in Groups A and B	Baseline; Weeks 1, 2, 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The difference between the population mean and raw scores was calculated as the weight for age z-score. Mean absolute values at Baseline were reported. The change from Baseline to each visit was averaged among all participants and expressed in units of standard deviations.Safety Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Height for Age Z-Score in Group C	Baseline; Weeks 12, 24, 36, 48; FU Weeks 12, 24 (up to 72 weeks overall)	The difference between the population mean and raw scores was calculated as the height for age z-score. Mean absolute values at Baseline were reported. The change from Baseline to each visit was averaged among all participants and expressed in units of standard deviations. Safety Population.
Change From Baseline in Weight for Age Z-Score in Group C	Baseline; Weeks 1, 2, 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The difference between the population mean and raw scores was calculated as the weight for age z-score. Mean absolute values at Baseline were reported. The change from Baseline to each visit was averaged among all participants and expressed in units of standard deviations. Safety Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With HBeAg Seroconversion at 24 Weeks After EOT in Group C	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. The percentage of participants with HBeAg seroconversion at 24 weeks after EOT was reported. The 95% CI was calculated by the Pearson-Clopper method. Safety Population.
Change From Baseline in Quantitative Serum ALT Level in Groups A and B	Weeks 1, 2, 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The change in quantitative ALT from Baseline to each visit was averaged among all participants and expressed as a factor of the laboratory-specific ULN (for example, 1 × ULN, 2 × ULN, 3 × ULN). ITT Population. All participants were included in the endpoint analysis. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Quantitative HBeAg Level in Groups A and B	Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	The change in quantitative HBeAg from Baseline to each visit was averaged among all participants and expressed in log10 PEIU/mL. ITT Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Quantitative HBsAg Level in Groups A and B	Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	The change in quantitative HBsAg from Baseline to each visit was averaged among all participants and expressed in log10 IU/mL. ITT Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Quantitative Serum ALT Level in Group C	Weeks 1, 2, 4, 8, 12, 18, 24, 30, 36, 42, 48; FU Weeks 4, 12, 24 (up to 72 weeks overall)	The change in quantitative ALT from Baseline to each visit was averaged among all participants and expressed as a factor of the laboratory-specific ULN (for example, 1 × ULN, 2 × ULN, 3 × ULN). Safety Population. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Change From Baseline in Quantitative HBeAg Level in Group C	Weeks 12, 24, 36, 48; FU Week 24 (up to 72 weeks overall)	The change in quantitative HBeAg from Baseline to each visit was averaged among all participants and expressed in log10 PEIU/mL. Safety Population. "Number of subjects analyzed" reflects the total number of participants who provided evaluable data at any timepoint. The number of participants who provided evaluable data for the analysis at each timepoint (n) is shown in the table.
Percentage of Participants With Loss of HBsAg at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of hepatitis B envelope antibody (anti-HBe). The percentage of participants with HBeAg seroconversion at 24 weeks after EOT/POP was reported. The 95 percent (%) confidence interval (CI) was calculated by the Pearson-Clopper method. Intent-to-Treat (ITT) Population: All randomized participants regardless of treatment received.
Percentage of Participants With Normal ALT at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	Normal ALT was defined as ALT ≤ ULN, where each ULN was given by the laboratory at which the sample was analyzed. The percentage of participants with normal ALT at EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV Deoxyribonucleic Acid (DNA) <20,000 International Units Per Milliliter (IU/mL) at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using polymerase chain reaction (PCR) by Roche Taqman. The percentage of participants with HBV DNA \<20,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA <2,000 IU/mL at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with HBV DNA \<2,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With HBV DNA Undetectable at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBV DNA was quantified using PCR by Roche Taqman. Undetectable HBV DNA was defined as HBV DNA \<29 IU/mL. The percentage of participants with HBV DNA undetectable at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <20,000 IU/mL at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.
Percentage of Participants With Combined HBeAg Seroconversion and HBV DNA <2,000 IU/mL at 24 Weeks After the End of Switch Treatment Period: Switch Group	FU Week 24 (up to 72 weeks overall)	HBeAg seroconversion was defined as loss of HBeAg and the presence of anti-HBe. HBV DNA was quantified using PCR by Roche Taqman. The percentage of participants with combined HBeAg seroconversion and HBV DNA \<2,000 IU/mL at 24 weeks after EOT/POP was reported. The 95% CI was calculated by the Pearson-Clopper method. ITT Population.

Trial Locations

Locations (39)

Johns Hopkins Hospital - Pediatric Gastroenterology; 🇺🇸 Baltimore, Maryland, United States

Children's Hospital Boston-Harvard Medical School; Division of Gastoenterology; 🇺🇸 Boston, Massachusetts, United States

Seattle Children's Hospital; 🇺🇸 Seattle, Washington, United States

The Third Affiliated Hospital of Sun Yat-Sen University; 🇨🇳 Guangzhou, China

HELIOS Klinikum Wuppertal, Zentrum für Kinder- und Jugendmedizin, Universität Witten-Herdecke; 🇩🇪 Wuppertal, Germany

Hadassah University Hospital - Ein Kerem; 🇮🇱 Jerusalem, Israel

First Affiliated Hospital of Medical College of Xi'an Jiaotong University; 🇨🇳 Xi'an, China

Western Galilee Hospital - Nahariya; 🇮🇱 Nahariya, Israel

Krakowski Szpital Specjalistyczny im Jana Pawła II; Oddział Chorób Infekcyjnych Dzieci; 🇵🇱 Krakow, Poland

Specialized Hospital for Active Treatment of Pediatrics Diseases; Clinic of Gastroenterology; 🇧🇬 Sofia, Bulgaria

Beijing You An Hospital; Digestive Dept; 🇨🇳 Beijing City, China

The Eighth People's Hospital of Guangzhou; 🇨🇳 Guangzhou, China

Cliniques Universitaires St-Luc; 🇧🇪 Bruxelles, Belgium

Beijing 302 Hospital; No. 2 Infectious Disease Section; 🇨🇳 Beijing, China

MC Gepatolog; 🇷🇺 Samara, Russian Federation

SI Sceintific children health center RAMS; 🇷🇺 Moscow, Russian Federation

University Hospital "St. Marine"; Dept. of Pediatrics; 🇧🇬 Varna, Bulgaria

Wojewodzki Specjalistyczny Szpital im. Dr W.Bieganskiego; Oddział Obserwacyjno-Zakażny dla Dzieci; 🇵🇱 Łodz, Poland

Univ of California SF, Benioff Children's Hospital; Pediatrics, Gastro, Hepatology & Nutrition; 🇺🇸 San Francisco, California, United States

the First Hospital of Jilin University; 🇨🇳 Changchun, China

FSI Scientific research Institute of children's infections; 🇷🇺 Saint Petersburg, Russian Federation

Uni Degli Studi Di Bologna - Policlinica S. Orsola; Inst. Di Malattie Infettive; 🇮🇹 Bologna, Emilia-Romagna, Italy

Wojewodzki Szpital Obserwacyjno-Zakazny; Oddział Pediatrii, Chorób Infekcyjnych i Hepatologii; 🇵🇱 Bydgoszcz, Poland

Kyiv Children's Clinical Infectious Diseases Hospital; 🇺🇦 Kyiv, Ukraine

St. Louis University - Cardinal Glennon Children's Medical Center; 🇺🇸 Saint Louis, Missouri, United States

Birmingham Children'S Hopsital; Liver Unit; 🇬🇧 Birmingham, United Kingdom

Rambam Medical Center; 🇮🇱 Haifa, Israel

Southwest Hospital , Third Military Medical University; 🇨🇳 Chongqing, China

The First Affilliated Hospital of Kunming Medical College; 🇨🇳 Kunming, China

Tongji Hosp, Tongji Med. Col, Huazhong Univ. of Sci. & Tech; 🇨🇳 Wuhan, China

Womens and Childrens Hospital; Department of Gastroenterology; 🇦🇺 North Adelaide, South Australia, Australia

Royal Children's Hospital; Department of Gastroenterology; 🇦🇺 Melbourne, Victoria, Australia

UZ Gent; 🇧🇪 Gent, Belgium

Xinjiang Uygur Autonomous Region Hospital of Chinese Traditional Medicine; 🇨🇳 Urumqi (乌鲁木齐), China

Imperial College Healthcare Trust; 🇬🇧 London, United Kingdom

SI Institute of the pediatrics, obstetrics and gynecology; 🇺🇦 Kyiv, Ukraine

Texas Children's Hospital; 🇺🇸 Houston, Texas, United States

SFI Sceintific Research institute of nutrition of RAMS; 🇷🇺 Moscow, Russian Federation

Kings College Hospital NHS Foundation Trust; 🇬🇧 London, United Kingdom