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CompletedNCT00570037PiiitchUpdated Jun 24, 2013Results posted

Feasibility of Cocooning Immunization Strategy With Influenza Vaccine

An interventional study of Trivalent inactivated influenza vaccine in Influenza, sponsored by Duke University. Completed at 2 sites in United States. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2013-06-24.

Sponsored by Duke University · Not applicable, Interventional, and Prevention

Phase
Not applicable
Study type
Interventional
Enrollment
544
Allocation
Non-randomized
Ages
18 Years and older
Sex
Female
01

Study summary

Influenza causes epidemics of respiratory infection in young children each winter. Young children, particularly those under 6 months of age are most vulnerable to suffering from complications secondary to influenza infection. Consequently, influenza vaccine has been recommended for children 6-59 months of age. Influenza vaccine is not approved for use in children under 6 month of age who are at highest risk. Therefore, the Centers for Disease Control and Prevention Advisory Committee on Immunization Practices has recommended vaccination of household contacts of children under 6 month of age - a cocooning strategy.

The current study is a hospital-based study to assess the effectiveness of a program to vaccinate birth mothers and household contacts of newborns with influenza vaccine. We propose to study both birth mothers and household contacts of newborns delivered at Durham Regional Hospital and Duke University Medical Center, birthing hospitals serving Durham and surrounding counties in central North Carolina. We will implement several strategies to increase vaccine coverage rates at Durham Regional Hospital utilizing Duke University Hospital as a comparison setting. Strategies will include: standing vaccine orders for birth mothers, vaccine reminders for household contacts, and a hospital based influenza vaccine clinic to increase vaccine accessibility for household contacts. Vaccine coverage rates will be assessed utilizing a survey method (maternal interview at the birthing hospital and a follow-up telephone contact 6-8 weeks later). We hypothesize that influenza vaccine coverage rates for new mothers and household contacts of newborns delivered at the intervention hospital will be higher when compared to coverage rates in the comparison hospital. Demographic determinants of vaccine coverage and reasons for refusal of influenza vaccine will also be assessed.

02

Conditions studied

  • Influenza

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Keywords

  • Influenza
  • Vaccine
  • Children
03

In context

Influenza, Human

2,214 studies on the registry are indexed under Influenza, Human; 163 are open to participants now.

This study's enrollment of 544 is above the median of 238 across 1,853 interventional studies indexed under Influenza, Human.

Browse Influenza, Human studies →

Lead sponsor

Duke University is the lead sponsor of 2,025 studies on the registry; 275 are open to participants now.

Of its 194 completed or terminated interventional studies of FDA-regulated products, 159 (82%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes

Inclusion criteria

  • Mother of a newborn delivered at either Durham Regional Hospital or Duke University Hospital between October 2007 and February 2008

Exclusion criteria

Exclusion Criteria:

  • Fetal demise or stillbirth
  • Maternal rights relinquished
  • Language barrier
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Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
544 participants (actual)

Study arms

  • Active comparator
    Immunization Program

    Intervention Hospital - Standing postpartum vaccine orders, influenza vaccine clinic on postpartum ward for household contacts, mailed vaccine reminders

    Biological: Trivalent inactivated influenza vaccine

  • No intervention
    No Immunization Program

    Comparison Hospital - Receipt of vaccine through routine clinical care

Interventions

  • BiologicalTrivalent inactivated influenza vaccine

    Intramuscular injection, 0.5 mL or 0.25 mL depending on age of vaccine recipient, one or two doses administered a month apart depending on age and prior influenza vaccination history of recipient

    Also known as: Fluzone

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What researchers measure

Primary outcomes

  1. Influenza Vaccine Coverage (Percent) for New Mothers of Newborns

    The percent of new mothers delivering at the hospital who reported receiving an influenza vaccine during their pregnancy, in the hospital after delivery, or during the 6 to 8 week postpartum period

    Time frame: Pregnancy period through 6 to 8 weeks postpartum

  2. Influenza Vaccine Coverage (Percent) for New Fathers of Newborns

    The percent of new fathers who as reported by new mothers received an influenza vaccine during the mothers pregnancy, in the hospital after delivery, or during the 6 to 8 week period following the birth of their baby

    Time frame: Pregnancy period through 6 to 8 weeks postpartum

  3. Influenza Vaccine Coverage (Percent) for All Household Contacts of Newborns

    The percent of all household contacts of newborns who as reported by new mothers received an influenza vaccine during the mothers pregnancy, in the hospital after delivery, or during the 6 to 8 week period following the birth of their baby

    Time frame: Pregnancy period through 6 to 8 weeks postpartum

07

Results

Posted Feb 1, 2011

Participant flow

October 2007 through February 2008 Post partum units of two Durham, North Carolina hospitals

Participant flow — Overall Study
MilestoneHospital With Immunization ProgramHospital With No Immunization Program
Started238306
Completed194237
Not completed4469
Withdrew: Could not reach for 6-8 week contact4469

Outcome measures

PrimaryInfluenza Vaccine Coverage (Percent) for New Mothers of Newborns

The percent of new mothers delivering at the hospital who reported receiving an influenza vaccine during their pregnancy, in the hospital after delivery, or during the 6 to 8 week postpartum period

Time frame:
Pregnancy period through 6 to 8 weeks postpartum
Reported as:
Number · Percentage of Participants
Influenza Vaccine Coverage (Percent) for New Mothers of Newborns
Percentage of ParticipantsHospital With Immunization ProgramHospital With No Immunization Program
Influenza Vaccine Coverage (Percent) for New Mothers of Newborns7064
PrimaryInfluenza Vaccine Coverage (Percent) for New Fathers of Newborns

The percent of new fathers who as reported by new mothers received an influenza vaccine during the mothers pregnancy, in the hospital after delivery, or during the 6 to 8 week period following the birth of their baby

Time frame:
Pregnancy period through 6 to 8 weeks postpartum
Reported as:
Number · Percentage of Fathers of Newborns
Influenza Vaccine Coverage (Percent) for New Fathers of Newborns
Percentage of Fathers of NewbornsHospital With Immunization ProgramHospital With No Immunization Program
Influenza Vaccine Coverage (Percent) for New Fathers of Newborns5326
PrimaryInfluenza Vaccine Coverage (Percent) for All Household Contacts of Newborns

The percent of all household contacts of newborns who as reported by new mothers received an influenza vaccine during the mothers pregnancy, in the hospital after delivery, or during the 6 to 8 week period following the birth of their baby

Time frame:
Pregnancy period through 6 to 8 weeks postpartum
Reported as:
Number · Percentage of All Household Contacts
Influenza Vaccine Coverage (Percent) for All Household Contacts of Newborns
Percentage of All Household ContactsHospital With Immunization ProgramHospital With No Immunization Program
Influenza Vaccine Coverage (Percent) for All Household Contacts of Newborns5539

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Hospital With Immunization Program—0/238 (0%)—
Hospital With No Immunization Program—0/306 (0%)—

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Hospital With Immunization ProgramHospital With No Immunization ProgramTotal
<=18 years000
Between 18 and 65 years238306544
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)Hospital With Immunization ProgramHospital With No Immunization ProgramTotal
Female238306544
Male000
Region of Enrollment
Region of Enrollment(participants)Hospital With Immunization ProgramHospital With No Immunization ProgramTotal
United States238306544
08

Study locations

2 sites
  • Durham Regional Hospital
    Durham, North Carolina 27704, United States
  • Duke University Hospital
    Durham, North Carolina 27710, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 24, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00570037
Lead sponsor
Duke University
Collaborators
Centers for Disease Control and Prevention
Responsible party
Sponsor
First posted
Dec 10, 2007
Start date
Oct 2007
Primary completion
Apr 2008
Completion
Apr 2008
Results posted
Feb 1, 2011
Last update
Jun 24, 2013

Study contacts

Emmanuel B Walter, MD, MPH
principal investigator · Duke Health

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2011. You cannot join it, but the record below documents what was studied.

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