Hutterite Influenza Prevention Study

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00877396
Recruitment Status : Completed
First Posted : April 7, 2009
Last Update Posted : September 28, 2011
Canadian Institutes of Health Research (CIHR)
Information provided by (Responsible Party):
Mark Loeb, McMaster University

January 22, 2009
April 7, 2009
September 28, 2011
September 2008
May 2011   (Final data collection date for primary outcome measure)
laboratory-confirmed influenza infection [ Time Frame: Dec to June each year for 3 years ]
Same as current
Complete list of historical versions of study NCT00877396 on Archive Site
  • Influenza like illness [ Time Frame: Dec to June each year for 3 years ]
  • Physician diagnosed otitis media [ Time Frame: Dec to June each year for 3 years ]
  • School or work related absenteeism [ Time Frame: Dec to June each year for 3 years ]
  • Physician visits for respiratory illness [ Time Frame: Dec to June each year for 3 years ]
  • Lower respiratory infection or pneumonia [ Time Frame: Dec to June each year for 3 years ]
  • Hospitalizations for LRTI or pneumonia [ Time Frame: Dec to June each year for 3 years ]
  • All cause hospitalizations [ Time Frame: Dec to June each year for 3 years ]
  • Deaths due to LRTI or pneumonia [ Time Frame: Dec to June each year for 3 years ]
  • All-cause deaths [ Time Frame: Dec to June each year for 3 years ]
Same as current
Not Provided
Not Provided
Hutterite Influenza Prevention Study
Does Vaccinating Health Hutterite Children Against Influenza Prevent Influenza in Other Hutterite Colony Members: A Randomized Cluster Trial
The goal of this randomized clinical trial is to determine whether immunizing children in Hutterite colonies with inactivated influenza vaccine can prevent influenza and its complications in other colony members. Furthermore, the study will assess the indirect benefit to Hutterites at high risk of complications. The study is a blinded, cluster randomized controlled trial among Hutterite colonies to test the hypothesis that high immunization rates (>70%) of healthy children with inactivated influenza vaccine reduces transmission of influenza to other colony members. Randomization of these homogeneous, moderately sized colonies where there is regular spread facilitated by a communal lifestyle, but limited re-introduction because of relative isolation from outside community, represents a unique opportunity to test the hypothesis of indirect benefit under close to ideal conditions. The primary outcome will be laboratory-confirmed influenza. Secondary outcomes include influenza-like illness, otitis media, physician visits, antimicrobial prescriptions, absenteeism, lower respiratory tract infection, hospitalizations, and death.

Colonies will be enrolled in September 2008.

Healthy Hutterite Children will be vaccinated in October, in each year of the study (2008, 2009, & 2010)

Influenza Surveillance phase will begin around December-January of each year.

  • All study outcomes will be collected during the Surveillance phase of the study from Dec to June for 3 years.
  • Outcomes will be collected when research nurses visit the colonies. A research nurse will visit enrolled colonies twice a week during the surveillance phase and review study diaries and obtain swabs from participants with symptoms of influenza.
Phase 4
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
  • Biological: Influenza vaccination
    Influenza vaccination- 0.5 mL. Children under 9 who have never received a influenza vaccine will receive a 2nd dose (0.5 mL) 4 weeks later.
    Other Name: Vaxigrip by Sanofi Pasteur
  • Biological: Hepatitis A Vaccine
    Hepatitis vaccination- 0.5 mL. Children under 9 who have never received a influenza vaccine will receive a 2nd dose ( saline- 0.5 mL) 4 weeks later.
    Other Name: Avaxim Pediatric by Sanofi Pasteur
  • Experimental: Influenza
    Inactivated Influenza vaccination
    Intervention: Biological: Influenza vaccination
  • Placebo Comparator: Control
    Hepatitis A vaccine
    Intervention: Biological: Hepatitis A Vaccine

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
July 2011
May 2011   (Final data collection date for primary outcome measure)

Group A:

Inclusion Criteria:

  • Hutterites other than the healthy children who will be immunized. Although this category as a whole will be used to assess indirect benefit of the vaccine in the main analysis, Hutterites at high risk for influenza complications within this category will be assessed in a separate analysis. These are defined as anyone in one or more of the following groups:
  • individuals aged ≥ 65 years
  • children 23 months of age or less
  • anyone with ≥ 1 of the following conditions severe enough to require regular medical follow-up or hospital care:

    • chronic cardiac or pulmonary disorders (including bronchopulmonary dysplasia, cystic fibrosis, and asthma)
    • diabetes mellitus and other metabolic diseases
    • cancer
    • immunodeficiency
    • immunosuppression (due to underlying disease and/or therapy)
    • renal disease
    • anemia
    • hemoglobinopathy
    • any condition that can compromise respiratory function or the handling of respiratory secretions or that can increase the risk of aspiration.

Exclusion Criteria:

  • There are no exclusion criteria for this category of participants.

Group B:

Inclusion Criteria:

  • Healthy children aged 36 months to 15 years who will be immunized as part of the intervention.

Exclusion Criteria:

  • Anaphylactic reaction to a previous dose of influenza vaccine
  • Anaphylactic reaction to hepatitis A vaccine
  • Anaphylactic reaction to neomycin
  • Known IgE-mediated hypersensitivity to eggs manifested as hives
  • Swelling of the mouth and throat, difficulty in breathing, hypotension, or shock
  • Guillain-Barré syndrome within eight weeks of a previous influenza vaccine.
Sexes Eligible for Study: All
Child, Adult, Older Adult
Contact information is only displayed when the study is recruiting subjects
Not Provided
MCT 88113
Not Provided
Not Provided
Mark Loeb, McMaster University
McMaster University
Canadian Institutes of Health Research (CIHR)
Principal Investigator: Mark B Loeb, MD McMaster University
McMaster University
September 2011

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP