Safety and Immunogenicity of a Paediatric Dose of Virosomal Hepatitis A Vaccine

July 28, 2014 updated by: Crucell Holland BV

A Phase II Open, Randomised, Controlled Study to Evaluate the Safety and Immunogenicity of a Paediatric Dose (0.25 mL) and the Standard Dose (0.5 mL) of Epaxal® With Reference to Havrix Junior® Healthy in Healthy Children and Adolescents (>=12 Months - 16 Years of Age) Using a 0/6 Month Schedule

The primary purpose of the original study was to assess whether the protection afforded by the paediatric dose of Epaxal vaccine against hepatitis A was not inferior to the protection afforded by the standard dose of Epaxal. The aim of the follow-up phase was to perform a computer based modelling analysis of the long term protection afforded by the paediatric dose, and to compare this with the standard dose and also with an alternative hepatitis A vaccine (Havrix Junior).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
308

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Belgium
      • Antwerp, Belgium, B-2018
        • Sint-Vincentiusziekenhuis
      • Antwerp, Belgium, BE-2610
        • Centre for the Evaluation of Vaccination, University of Antwerp

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

1 year to 16 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

Original study:

  • Males or females aged >=12 months and 16 years of age at the time of the first vaccination.
  • Written informed consent obtained from the subject when applicable and from the parent/legal guardian of the subject. - Free of obvious health problems as established by medical history and/or clinical examination before entering the study.

Follow up phase:

  • Subjects enrolled and randomized in the primary study and having received two doses of the study vaccine

Exclusion Criteria:

  • Use of any investigational or non-registered drug or vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period and safety follow-up
  • Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first vaccine dose. (For corticosteroids, this means prednisone, or equivalent, >=0.5 mg/kg/day. Inhaled and topical steroids were allowed.)
  • Planned administration/administration of a vaccine not foreseen by the study protocol within 4 weeks prior to the first dose of study vaccine
  • Previous vaccination against hepatitis A
  • Seropositive for anti-HAV antibodies (>=10 mIU/mL)
  • Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection
  • History of allergic disease or reactions likely to be exacerbated by any component of the vaccine.
  • Major congenital defects or serious chronic illness
  • Acute disease at the time of enrolment

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Epaxal 0.25 mL
Single intramuscular dose (M. deltoideus) given on Day 1 and at Month 6
Biological: Epaxal 0.25 mL
12 IU hepatitis A antigen coupled to immunopotentiating reconstituted Influenza virosome (IRIV)
Active Comparator: Epaxal 0.5 mL
Single intramuscular dose (M. deltoideus) given on Day 1 and at Month 6
Biological: Epaxal 0.5 mL
24 IU hepatitis A antigen coupled to IRIV
Active Comparator: Havrix Junior
Single intramuscular dose (M. deltoideus) given on Day 1 and at Month 6
Biological: Havrix Junior 0.5 mL
720 EU hepatitis A antigen absorbed onto aluminum hydroxide

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Individual anti-HAV titers
Time Frame: 66 months post-booster
Real-time seroprotection analysis and computer modelling will be conducted up to 5 years post-booster to estimate long term seroprotection
66 months post-booster
Individual anti-HAV titers
Time Frame: 18 months post-booster
Real-time seroprotection analysis and computer modelling will be conducted up to 5 years post-booster to estimate long term seroprotection
18 months post-booster
Individual anti-HAV titers
Time Frame: 30 months post-booster
Real-time seroprotection analysis and computer modelling will be conducted up to 5 years post-booster to estimate long term seroprotection
30 months post-booster
Individual anti-HAV titers
Time Frame: 42 months post-booster
Real-time seroprotection analysis and computer modelling will be conducted up to 5 years post-booster to estimate long term seroprotection
42 months post-booster
Individual anti-HAV titers
Time Frame: 54 months post-booster
Real-time seroprotection analysis and computer modelling will be conducted up to 5 years post-booster to estimate long term seroprotection
54 months post-booster

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Geometric mean titers
Time Frame: 18, 30, 42, 54, 66 months post-booster
18, 30, 42, 54, 66 months post-booster
Seroprotection
Time Frame: 18, 30, 42, 54, 66 months post-booster
Porportion of subjects who are seroprotected calculated at each time point where seroprotection is defined as >=10 mIU/mL
18, 30, 42, 54, 66 months post-booster

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Crucell Holland BV

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Pierre van Damme, MD, Universiteit Antwerpen
  • Principal Investigator: Andre Vertruyen, MD, Sint-Vincentiusziekenhuis

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2004

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2012

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2012

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 28, 2011

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 28, 2011

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 29, 2011

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 29, 2014

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 28, 2014

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • EPA 001 FU

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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