Non-inferiority Study of GSK Biologicals' Influenza Vaccine GSK576389A Using Different Formulations

Study Overview
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Brief Summary
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The purpose of this study is to show the non-inferiority of different formulations of GlaxoSmithKline Biologicials' influenza vaccine.

Official Title
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Non-inferiority Study of GlaxoSmithKline Biologicals' Influenza Vaccine GSK576389A Using Different Formulations.

Conditions
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Influenza

Intervention / Treatment
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* Biological: Thiomersal-free FluAS25 adjuvanted vaccine (GSK576389A)
* Biological: Thiomersal reduced FluAS25 adjuvanted vaccine (GSK576389A)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects who the investigator believes that they can and will comply with the requirements of the protocol should be enrolled in the study. A male or female 65 years of age or older at the time of vaccination. Written informed consent obtained from the subject. Free of an acute aggravation of the health status as established by clinical evaluation (medical history and medical history directed examination) before entering into the study. Exclusion Criteria: Suspected (based on clinical symptoms) or confirmed (based on laboratory results) influenza infection within the last 6 months. Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) within 30 days preceding the first dose of study vaccine, or planned use during the study period. Administration of other licensed vaccines within 2 weeks (for inactivated vaccines) or 4 weeks (for live vaccines) prior to enrolment in this study. Planned administration of a vaccine not foreseen by the study protocol up to 21 days after vaccination. Planned administration of an influenza vaccine other than the study vaccines during the entire study period. Previous vaccination against influenza with any seasonal vaccine since July 2007. Chronic administration of immunosuppressants or other immune-modifying drugs within six months prior to the first vaccine dose. Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination. History of hypersensitivity to a previous dose of influenza vaccine. History of allergy or reactions likely to be exacerbated by any component of the vaccine(s) including egg and chicken protein. Acute (active) clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by clinical evaluation (medical history and medical history directed physical examination) or pre-existing laboratory screening tests. Acute disease at the time of enrolment. Administration of immunoglobulins and/or any blood products within the three months preceding the first dose of study vaccine or planned administration during the study period. Any medical conditions in which IM injections are contraindicated

Ages Eligible for Study
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Minimum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Thiomersal-free FluAS25 adjuvanted vaccine group<br>Subjects received 1 dose of thiomersal-free FluAS25 adjuvanted vaccine | Biological: Thiomersal-free FluAS25 adjuvanted vaccine (GSK576389A)<br>* Intramuscular administration, 1 dose<br>|
| Experimental: Thiomersal reduced FluAS25 adjuvanted vaccine group<br>Subjects received 1 dose of thiomersal reduced FluAS25 adjuvanted vaccine | Biological: Thiomersal reduced FluAS25 adjuvanted vaccine (GSK576389A)<br>* Intramuscular administration, 1 dose<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Serum Haemagglutination-inhibition (HI) Antibody Titer Against the Three Vaccine Strains | Titers were expressed as Geometric Mean Titers (GMTs). The three vaccine strains assessed included A/Solomon Islands, A/Wisconsin and B/Malaysia. | Days 0 and 21 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Subjects Seropositive for HI Antibodies Against the Three Vaccine Strains | A seropositive subject was defined as a subject with a serum HI titer greater than or equal to 1:10. The three vaccine strains assessed included A/Solomon Islands, A/Wisconsin and B/Malaysia. | Days 0 and 21 | 
| Number of Subjects Seroconverted for HI Antibodies Against the Three Vaccine Strains | A seroconverted subject was defined as a subject who had either a pre-vaccination titer below 1:10 and a post-vaccination titer greater than or equal to 1:40 or a pre-vaccination titer greater than or equal to 1:10 and at least a four-fold increase in post-vaccination titer. The three vaccine strains assessed included A/Solomon Islands, A/Wisconsin and B/Malaysia. | Day 21 | 
| HI Antibody Seroconversion Factors | Seroconversion factor was defined as the fold increase in serum HI GMTs post-vaccination compared to Day 0. The three vaccine strains assessed included A/Solomon Islands, A/Wisconsin and B/Malaysia. | Day 21 | 
| Number of Subjects Seroprotected for HI Antibodies Against the Three Vaccine Strains | A seroprotected subject was defined as a suject with a serum HI titer greater than or equal to 1:40 that usually is accepted as indicating protection. | Days 0 and 21 | 
| Number of Subjects Reporting Any and Grade 3 Solicited Local Symptoms | Solicited local symptoms assessed include ecchymosis, pain, redness and swelling. Any: any symptom regardless of intensity grade. Grade 3 pain: considerable pain at rest, which prevented normal everyday activities. Grade 3 ecchymosis, redness and swelling: more than 100 millimeter. | During a 7-day period after vaccination | 
| Duration of Solicited Local Symptoms | Duration was expressed as median number of days the symptom persisted. Solicited local symptoms assessed include ecchymosis, pain, redness and swelling. | During a 7-day period after vaccination | 
| Number of Subjects Reporting Any, Grade 3 and Related Solicited General Symptoms | Solicited general symptoms assessed include arthralgia, fatigue, headache, myalgia, nausea, shivering and fever. Any: any symptom regardless of intensity grade; any fever: oral temperature greater than or equal to 38 degrees Celsius (°C). Grade 3: symptoms that prevented normal activity ; Grade 3 fever: oral temperature greater than 39°C. Related: symptom assessed by the investigator as causally related to the study vaccination. | During a 7-day period after vaccination | 
| Duration of Solicited General Symptoms | Duration was expressed as median number of days the symptom persisted. Solicited general symptoms assessed include arthralgia, fatigue, headache, myalgia, nausea, shivering and fever. | During a 7-day period after vaccination | 
| Number of Subjects Reporting Any, Grade 3 and Related Unsolicited Adverse Events (AEs) | Unsolicited AE covers any AE reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. | During a 21-day period after vaccination | 
| Number of Subjects Reporting Any, Grade 3 and Related Medically Significant Conditions (MSCs) | Medically Significant Conditions (MSCs) included all unsolicited adverse events that resulted in a medically attended visit. | During a 21-day period after vaccination | 
| Number of Subjects Reporting Any and Related Serious Adverse Events (SAEs) | SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. | During the entire study period (up to Day 21) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Influenza