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Sanofi H1N1 Influenza Vaccine Administered at Two Dose Levels in Adult and Elderly Populations

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier:
NCT00943631
First received: July 21, 2009
Last updated: October 25, 2012
Last verified: March 2010
Results First Received: March 17, 2011  
Study Type: Interventional
Study Design: Allocation: Randomized;   Intervention Model: Parallel Assignment;   Masking: Double Blind (Participant, Investigator, Outcomes Assessor);   Primary Purpose: Prevention
Condition: Influenza
Intervention: Biological: Inactivated H1N1 Vaccine

  Participant Flow
  Hide Participant Flow

Recruitment Details
Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
Participants were healthy adult males and females recruited from existing volunteer populations and from the communities at large around the clinical sites. Participants were enrolled and vaccinated between 07AUG2009 and 18AUG2009.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
No text entered.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Participant Flow:   Overall Study
    H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg
STARTED   202   204 
COMPLETED   198   202 
NOT COMPLETED   4   2 



  Baseline Characteristics
  Hide Baseline Characteristics

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
No text entered.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
Total Total of all reporting groups

Baseline Measures
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg   Total 
Overall Participants Analyzed 
[Units: Participants]
 202   204   406 
Age 
[Units: Participants]
     
<=18 years   0   0   0 
Between 18 and 65 years   102   100   202 
>=65 years   100   104   204 
Age 
[Units: Years]
Mean (Standard Deviation)
 58.7  (17.1)   59.6  (16.4)   59.1  (16.7) 
Gender 
[Units: Participants]
     
Female   103   112   215 
Male   99   92   191 
Region of Enrollment 
[Units: Participants]
     
United States   202   204   406 


  Outcome Measures
  Hide All Outcome Measures

1.  Primary:   Number of Participants Reporting Vaccine-associated Serious Adverse Events (SAEs)   [ Time Frame: Day 0 through Day 180 after last vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Vaccine-associated Serious Adverse Events (SAEs)
Measure Description Serious adverse events included any untoward medical occurrence that resulted in death; was life threatening; was a persistent/significant disability/incapacity; required in-patient hospitalization or prolongation thereof; resulted in a congenital anomaly/birth defect; or may have jeopardized the participant or required intervention to prevent one of these outcomes. Association to vaccination was determined by a study clinician licensed to make medical diagnoses.
Time Frame Day 0 through Day 180 after last vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
No text entered.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 202   204 
Number of Participants Reporting Vaccine-associated Serious Adverse Events (SAEs) 
[Units: Participants]
 0   0 

No statistical analysis provided for Number of Participants Reporting Vaccine-associated Serious Adverse Events (SAEs)



2.  Primary:   Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the First Vaccination   [ Time Frame: Day 0-7 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the First Vaccination
Measure Description Participants maintained a memory aid to record daily the occurrence of local reactions of pain, tenderness and swelling for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they reported experiencing the symptom at any severity on any of the 8 days.
Time Frame Day 0-7 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the first vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 202   204 
Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the First Vaccination 
[Units: Participants]
   
Pain   36   34 
Tenderness   58   75 
Swelling   27   16 

No statistical analysis provided for Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the First Vaccination



3.  Primary:   Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the Second Vaccination   [ Time Frame: Day 0-7 after second vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the Second Vaccination
Measure Description Participants maintained a memory aid to record daily the occurrence of local reactions of pain, tenderness and swelling for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they reported experiencing the symptom at any severity on any of the 8 days.
Time Frame Day 0-7 after second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the second vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 192   197 
Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the Second Vaccination 
[Units: Participants]
   
Pain   27   27 
Tenderness   54   63 
Swelling   10   18 

No statistical analysis provided for Number of Participants Reporting Solicited Local Reactions Based on the Functional Grading Scale After the Second Vaccination



4.  Primary:   Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the First Vaccination   [ Time Frame: Day 0-7 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the First Vaccination
Measure Description Participants maintained a memory aid to record daily the occurrence of local reactions of swelling and redness for 8 days after vaccination (Day 0-7). If the reaction was present, the maximum diameter was measured in millimeters (mm). Participants are counted if they reported experiencing the reaction with any measurement greater than 0 mm on any of the 8 days.
Time Frame Day 0-7 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the first vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 202   204 
Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the First Vaccination 
[Units: Participants]
   
Swelling   31   22 
Redness   39   32 

No statistical analysis provided for Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the First Vaccination



5.  Primary:   Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the Second Vaccination   [ Time Frame: Day 0-7 after second vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the Second Vaccination
Measure Description Participants maintained a memory aid to record daily the occurrence of local reactions of swelling and redness for 8 days after vaccination (Day 0-7). If the reaction was present, the maximum diameter was measured in millimeters (mm). Participants are counted if they reported experiencing the reaction with any measurement greater than 0 mm on any of the 8 days.
Time Frame Day 0-7 after second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the second vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 192   197 
Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the Second Vaccination 
[Units: Participants]
   
Swelling   11   18 
Redness   33   25 

No statistical analysis provided for Number of Participants Reporting Measured Injection Site Reactions of Swelling and Redness After the Second Vaccination



6.  Primary:   Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the First Vaccination   [ Time Frame: Day 0-7 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the First Vaccination
Measure Description Participants maintained a memory aid to record daily the occurrence of systemic symptoms of feverishness, malaise, myalgia, headache, and nausea for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they reported experiencing the symptom at any severity on any of the 8 days.
Time Frame Day 0-7 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the first vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 202   204 
Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the First Vaccination 
[Units: Participants]
   
Feverishness   11   5 
Malaise   31   30 
Myalgia   23   22 
Headache   46   42 
Nausea   5   6 

No statistical analysis provided for Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the First Vaccination



7.  Primary:   Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the Second Vaccination   [ Time Frame: Day 0-7 after second vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the Second Vaccination
Measure Description Participants maintained a memory aid to record daily the occurrence of systemic symptoms of feverishness, malaise, myalgia, headache, and nausea for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they reported experiencing the symptom at any severity on any of the 8 days.
Time Frame Day 0-7 after second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the second vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 192   197 
Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the Second Vaccination 
[Units: Participants]
   
Feverishness   11   10 
Malaise   32   25 
Myalgia   25   18 
Headache   20   33 
Nausea   10   11 

No statistical analysis provided for Number of Participants Reporting Solicited Systemic Reactions Based on the Functional Grading Scale After the Second Vaccination



8.  Primary:   Number of Participants Reporting Fever After the First Vaccination   [ Time Frame: Day 0-7 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Fever After the First Vaccination
Measure Description Participants were provided with a thermometer and a memory aid on which to record daily oral temperatures for 8 days after vaccination (Day 0-7). The protocol defined fever as oral temperature of 38.0 degrees Celsius or higher. Participants are counted as experiencing fever if they reported oral temperatures of 38.0 degrees Celsius or higher on any of the 8 days.
Time Frame Day 0-7 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the first vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 202   204 
Number of Participants Reporting Fever After the First Vaccination 
[Units: Participants]
 2   1 

No statistical analysis provided for Number of Participants Reporting Fever After the First Vaccination



9.  Primary:   Number of Participants Reporting Fever After the Second Vaccination   [ Time Frame: Day 0-7 after second vaccination ]

Measure Type Primary
Measure Title Number of Participants Reporting Fever After the Second Vaccination
Measure Description Participants were provided with a thermometer and a memory aid on which to record daily oral temperatures for 8 days after vaccination (Day 0-7). The protocol defined fever as oral temperature of 38.0 degrees Celsius or higher. Participants are counted as experiencing fever if they reported oral temperatures of 38.0 degrees Celsius or higher on any of the 8 days.
Time Frame Day 0-7 after second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants receiving the second vaccination are included in the safety ITT cohort.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 192   197 
Number of Participants Reporting Fever After the Second Vaccination 
[Units: Participants]
 2   0 

No statistical analysis provided for Number of Participants Reporting Fever After the Second Vaccination



10.  Primary:   Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine   [ Time Frame: Baseline and Day 8-10 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine
Measure Description Blood was collected from all participants prior to vaccination and at the 8-10 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 8-10 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 8-10 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 8-10 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at both timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 101   100 
Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine 
[Units: Participants]
 80   85 

No statistical analysis provided for Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine



11.  Primary:   Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine   [ Time Frame: Baseline and Day 8-10 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine
Measure Description Blood was collected from all participants prior to vaccination and at the 8-10 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 8-10 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 8-10 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 8-10 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at both timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 100   104 
Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine 
[Units: Participants]
 63   69 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 1 Dose of Vaccine



12.  Primary:   Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine   [ Time Frame: Baseline and Day 21 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine
Measure Description Blood was collected from all participants prior to vaccination and at the 21 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 8-10 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 8-10 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 21 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at both timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 100   98 
Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine 
[Units: Participants]
 86   87 

No statistical analysis provided for Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine



13.  Primary:   Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine   [ Time Frame: Baseline and Day 21 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine
Measure Description Blood was collected from all participants prior to vaccination and at the 21 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 8-10 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 8-10 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 21 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at both timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum. One participant was excluded due to the blood being collected after administration of the second vaccination.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 98   103 
Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine 
[Units: Participants]
 66   83 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of Vaccine



14.  Primary:   Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine   [ Time Frame: Day 0 prior to and Day 8-10 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine
Measure Description Blood was collected from all participants prior to vaccination and at the 8-10 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 0 prior to and Day 8-10 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at both timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 101   100 
Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine 
[Units: Participants]
   
Day 0   14   9 
Day 8   85   89 

No statistical analysis provided for Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine



15.  Primary:   Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine   [ Time Frame: Day 0 prior to and Day 8-10 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine
Measure Description Blood was collected from all participants prior to vaccination and at the 8-10 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 0 prior to and Day 8-10 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at both timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 100   104 
Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine 
[Units: Participants]
   
Day 0   24   25 
Day 8   80   84 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Prior to and at 8-10 Days Following 1 Dose of H1N1 Vaccine



16.  Primary:   Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine   [ Time Frame: Day 21 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine
Measure Description Blood was collected from all participants at the 21 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 21 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at the timepoint. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 100   98 
Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine 
[Units: Participants]
 90   90 

No statistical analysis provided for Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine



17.  Primary:   Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine   [ Time Frame: Day 21 after first vaccination ]

Measure Type Primary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine
Measure Description Blood was collected from all participants at the 21 day follow up visit for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 21 after first vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the first vaccination and had blood collected at the timepoint. Participants were analyzed as treated. This outcome measure restricts to age stratum. One participant was excluded due to the blood being collected after administration of the second vaccination.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 98   103 
Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine 
[Units: Participants]
 79   94 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 1 Dose of H1N1 Vaccine



18.  Secondary:   Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine   [ Time Frame: Baseline and Day 8-10 and 21 after the second vaccination ]

Measure Type Secondary
Measure Title Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine
Measure Description Blood was collected from all participants prior to the initial vaccination as well as 8-10 and 21 days after the second vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 21 post vaccination 2 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 21 post vaccination 2 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 8-10 and 21 after the second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the both vaccinations and had blood collected at the timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 95   95 
Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine 
[Units: Participants]
   
Day 8-10   86   83 
Day 21   84   82 

No statistical analysis provided for Number of Participants in the 18-64 Year Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine



19.  Secondary:   Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine   [ Time Frame: Baseline and Day 8-10 after the second vaccination ]

Measure Type Secondary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine
Measure Description Blood was collected from all participants prior to the initial vaccination and 8-10 days after the second vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 21 post vaccination 2 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 21 post vaccination 2 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 8-10 after the second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the both vaccinations and had blood collected at the timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum. One subject was excluded due to receipt of a non-study vaccine prior to the clinic visit.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 94   100 
Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine 
[Units: Participants]
 68   84 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine



20.  Secondary:   Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine   [ Time Frame: Baseline and Day 21 after the second vaccination ]

Measure Type Secondary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine
Measure Description Blood was collected from all participants prior to the initial vaccination and 21 days after the second vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 21 post vaccination 2 titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 21 post vaccination 2 titer was an increase by 4-fold or more.
Time Frame Baseline and Day 21 after the second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received the both vaccinations and had blood collected at the timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum. One subject was excluded due to receipt of a non-study vaccine prior to the clinic visit.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 95   101 
Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine 
[Units: Participants]
 70   82 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With 4-fold or Greater HAI Antibody Titer Increases Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine



21.  Secondary:   Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine   [ Time Frame: Day 8-10 and Day 21 after the second vaccination ]

Measure Type Secondary
Measure Title Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine
Measure Description Blood was collected from all participants at Day 8-10 and Day 21 post second vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 8-10 and Day 21 after the second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received both vaccinations and had blood collected at the timepoints. Participants were analyzed as treated. This outcome measure restricts to age stratum.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 95   95 
Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine 
[Units: Participants]
   
Day 8-10   88   86 
Day 21   88   87 

No statistical analysis provided for Number of Participants in the 18-64 Year Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 and 21 Days Following 2 Doses of H1N1 Vaccine



22.  Secondary:   Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine   [ Time Frame: Day 8-10 after the second vaccination ]

Measure Type Secondary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine
Measure Description Blood was collected from all participants at Day 8-10 post second vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 8-10 after the second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received both vaccinations and had blood collected at the timepoint. Participants were analyzed as treated. This outcome measure restricts to age stratum. One subject was excluded due to receipt of an non-study vaccine prior to the clinic visit.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 94   100 
Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine 
[Units: Participants]
 80   92 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 8-10 Days Following 2 Doses of H1N1 Vaccine



23.  Secondary:   Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine   [ Time Frame: Day 21 after the second vaccination ]

Measure Type Secondary
Measure Title Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine
Measure Description Blood was collected from all participants at Day 21 post second vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time Frame Day 21 after the second vaccination  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Participants were included in the analyses if they received both vaccinations and had blood collected at the timepoint. Participants were analyzed as treated. This outcome measure restricts to age stratum. One subject was excluded due to receipt of an non-study vaccine prior to the clinic visit.

Reporting Groups
  Description
H1N1 Vaccine 15 Mcg Participants received 15 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.
H1N1 Vaccine 30 Mcg Participants received 30 mcg of H1N1 vaccine by intramuscular injection on Days 0 and 21.

Measured Values
   H1N1 Vaccine 15 Mcg   H1N1 Vaccine 30 Mcg 
Participants Analyzed 
[Units: Participants]
 95   101 
Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine 
[Units: Participants]
 79   93 

No statistical analysis provided for Number of Participants in the 65 Years and Older Age Stratum With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus at 21 Days Following 2 Doses of H1N1 Vaccine




  Serious Adverse Events


  Other Adverse Events


  Limitations and Caveats
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Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
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